### Initializing Beanie ODM in FastAPI Startup

Source: https://fastapi-users.github.io/fastapi-users/latest/migration/9x_to_10x

Provides an example of how to initialize Beanie ODM with the FastAPI application during the startup event, specifying the database and document models.

```python
from beanie import init_beanie


@app.on_event("startup")
async def on_startup():
    await init_beanie(
        database=db,
        document_models=[
            User,
        ],
    )
```

--------------------------------

### Install Dependencies

Source: https://fastapi-users.github.io/fastapi-users/latest/configuration/full-example

Installs necessary Python packages for FastAPI, FastAPI Users with SQLAlchemy, and Uvicorn for running the application. It also includes aiohttp for asynchronous SQLite operations.

```Python
fastapi
fastapi-users[sqlalchemy]
uvicorn[standard]
aiosqlite
```

--------------------------------

### Install FastAPI Users with SQLAlchemy

Source: https://fastapi-users.github.io/fastapi-users/latest/installation

Installs the FastAPI Users library with support for SQLAlchemy as the database backend. This is a common setup for projects using relational databases with FastAPI.

```Shell
pip install "fastapi-users[sqlalchemy]"
```

--------------------------------

### Install FastAPI Users with Redis Support

Source: https://fastapi-users.github.io/fastapi-users/latest/configuration/authentication/strategies/redis

Installs the fastapi-users library with the necessary optional dependencies for Redis integration.

```Shell
pip install'fastapi-users[redis]'
```

--------------------------------

### Install FastAPI Users with Beanie

Source: https://fastapi-users.github.io/fastapi-users/latest/configuration/full-example

Lists the necessary packages to install for FastAPI Users with Beanie integration, including FastAPI, FastAPI Users with Beanie support, and Uvicorn for running the application.

```text
fastapi
fastapi-users[beanie]
uvicorn[standard]
```

--------------------------------

### FastAPI Users Full Example with JWT Authentication

Source: https://fastapi-users.github.io/fastapi-users/latest/configuration/full-example

This snippet demonstrates a full working example of FastAPI Users with JWT authentication. It highlights the setup and usage of the library for secure user management. Remember to replace 'SECRET' with a strong, unique passphrase for security.

```python
from fastapi import FastAPI
from fastapi_users import FastAPIUsers
from fastapi_users.authentication import JWTAuthentication
from fastapi_users.db import SQLAlchemyUserDatabase
from sqlalchemy import create_engine, Column, Integer, String, Boolean
from sqlalchemy.ext.declarative import declarative_base
from sqlalchemy.orm import sessionmaker

# Database Setup (Example with SQLAlchemy)
DATABASE_URL = "sqlite:///./test.db"

engine = create_engine(DATABASE_URL)
SessionLocal = sessionmaker(autocommit=False, autoflush=False, bind=engine)

Base = declarative_base()

class User(Base):
    __tablename__ = "users"

    id = Column(Integer, primary_key=True, index=True)
    email = Column(String, unique=True, index=True, nullable=False)
    hashed_password = Column(String, nullable=False)
    is_active = Column(Boolean, default=True)
    is_superuser = Column(Boolean, default=False)
    is_verified = Column(Boolean, default=False)

Base.metadata.create_all(bind=engine)

# User Database
def get_user_db():
    db = SessionLocal()
    try:
        yield SQLAlchemyUserDatabase(db, User)
    finally:
        db.close()

# Authentication
SECRET = "YOUR_STRONG_SECRET_KEY"

authenticator = JWTAuthentication(secret=SECRET, lifetime_seconds=3600)

fastapi_users = FastAPIUsers(
    get_user_db(),
    authenticator,
)

app = FastAPI()

app.include_router(fastapi_users.get_auth_router(authenticator))
app.include_router(fastapi_users.get_register_router())
app.include_router(fastapi_users.get_users_router())

@app.get("/authenticated")
def authenticated_endpoint(user=fastapi_users.current_user()):
    return {"message": f"Hello, {user.email}! You are authenticated."} 

```

--------------------------------

### SQLAlchemy User and Access Token Database Setup

Source: https://fastapi-users.github.io/fastapi-users/latest/configuration/authentication/strategies/database

Sets up SQLAlchemy models for users and access tokens, along with the necessary database engine and session management for FastAPI Users. It includes functions to create tables, get an async session, and retrieve user and access token databases.

```Python
from collections.abc import AsyncGenerator

from fastapi import Depends
from fastapi_users.db import SQLAlchemyBaseUserTableUUID, SQLAlchemyUserDatabase
from fastapi_users_db_sqlalchemy.access_token import (
    SQLAlchemyAccessTokenDatabase,
    SQLAlchemyBaseAccessTokenTableUUID,
)
from sqlalchemy.ext.asyncio import AsyncSession, async_sessionmaker, create_async_engine
from sqlalchemy.orm import DeclarativeBase

DATABASE_URL = "sqlite+aiosqlite:///./test.db"


class Base(DeclarativeBase):
    pass


class User(SQLAlchemyBaseUserTableUUID, Base):
    pass


class AccessToken(SQLAlchemyBaseAccessTokenTableUUID, Base):
      pass


engine = create_async_engine(DATABASE_URL)
async_session_maker = async_sessionmaker(engine, expire_on_commit=False)


async def create_db_and_tables():
    async with engine.begin() as conn:
        await conn.run_sync(Base.metadata.create_all)


async def get_async_session() -> AsyncGenerator[AsyncSession, None]:
    async with async_session_maker() as session:
        yield session


async def get_user_db(session: AsyncSession = Depends(get_async_session)):
    yield SQLAlchemyUserDatabase(session, User)


async def get_access_token_db(
    session: AsyncSession = Depends(get_async_session),
):
      yield SQLAlchemyAccessTokenDatabase(session, AccessToken)

```

--------------------------------

### Setup Register Router with FastAPI Users

Source: https://fastapi-users.github.io/fastapi-users/latest/configuration/routers/register

This code demonstrates how to set up the registration router for FastAPI Users. It includes importing necessary components like FastAPI, FastAPIUsers, User model, and schemas. The code then initializes FastAPIUsers and includes the generated register router in the FastAPI application with a specified prefix and tags.

```Python
import uuid

from fastapi import FastAPI
from fastapi_users import FastAPIUsers

from .db import User
from .schemas import UserCreate, UserRead

fastapi_users = FastAPIUsers[User, uuid.UUID](
    get_user_manager,
    [auth_backend],
)

app = FastAPI()
app.include_router(
    fastapi_users.get_register_router(UserRead, UserCreate),
    prefix="/auth",
    tags=["auth"],
)

```

--------------------------------

### Main FastAPI Application Setup

Source: https://fastapi-users.github.io/fastapi-users/latest/configuration/oauth

Sets up the main FastAPI application, including database initialization, user authentication routes, and OAuth integration with Google.

```Python
from contextlib import asynccontextmanager

from fastapi import Depends, FastAPI

from app.db import User, create_db_and_tables
from app.schemas import UserCreate, UserRead, UserUpdate
from app.users import (
    SECRET,
    auth_backend,
    current_active_user,
    fastapi_users,
    google_oauth_client,
)


@asynccontextmanager
async def lifespan(app: FastAPI):
    # Not needed if you setup a migration system like Alembic
    await create_db_and_tables()
    yield


app = FastAPI(lifespan=lifespan)

app.include_router(
    fastapi_users.get_auth_router(auth_backend), prefix="/auth/jwt", tags=["auth"]
)
app.include_router(
    fastapi_users.get_register_router(UserRead, UserCreate),
    prefix="/auth",
    tags=["auth"],
)
app.include_router(
    fastapi_users.get_reset_password_router(),
    prefix="/auth",
    tags=["auth"],
)
app.include_router(
    fastapi_users.get_verify_router(UserRead),
    prefix="/auth",
    tags=["auth"],
)
app.include_router(
    fastapi_users.get_users_router(UserRead, UserUpdate),
    prefix="/users",
    tags=["users"],
)
app.include_router(
    fastapi_users.get_oauth_router(google_oauth_client, auth_backend, SECRET),
    prefix="/auth/google",
    tags=["auth"],
)


@app.get("/authenticated-route")
async def authenticated_route(user: User = Depends(current_active_user)):
    return {"message": f"Hello {user.email}!"}
```

--------------------------------

### Example Script to Run Create User Function

Source: https://fastapi-users.github.io/fastapi-users/latest/cookbook/create-user-programmatically

This Python script shows how to execute the `create_user` function using `asyncio.run`. It's a simple example to demonstrate calling the user creation logic from a main execution block.

```Python
import asyncio

if __name__ == "__main__":
  asyncio.run(create_user("king.arthur@camelot.bt", "guinevere"))

```

--------------------------------

### FastAPI Application Setup

Source: https://fastapi-users.github.io/fastapi-users/latest/configuration/full-example

Sets up the main FastAPI application, including database initialization, and includes routers for authentication, user registration, password reset, verification, and user management.

```Python
from contextlib import asynccontextmanager

from fastapi import Depends, FastAPI

from app.db import User, create_db_and_tables
from app.schemas import UserCreate, UserRead, UserUpdate
from app.users import auth_backend, current_active_user, fastapi_users


@asynccontextmanager
async def lifespan(app: FastAPI):
    # Not needed if you setup a migration system like Alembic
    await create_db_and_tables()
    yield


app = FastAPI(lifespan=lifespan)

app.include_router(
    fastapi_users.get_auth_router(auth_backend), prefix="/auth/jwt", tags=["auth"]
)
app.include_router(
    fastapi_users.get_register_router(UserRead, UserCreate),
    prefix="/auth",
    tags=["auth"],
)
app.include_router(
    fastapi_users.get_reset_password_router(),
    prefix="/auth",
    tags=["auth"],
)
app.include_router(
    fastapi_users.get_verify_router(UserRead),
    prefix="/auth",
    tags=["auth"],
)
app.include_router(
    fastapi_users.get_users_router(UserRead, UserUpdate),
    prefix="/users",
    tags=["users"],
)


@app.get("/authenticated-route")
async def authenticated_route(user: User = Depends(current_active_user)):
    return {"message": f"Hello {user.email}!"}
```

--------------------------------

### Install FastAPI Users

Source: https://fastapi-users.github.io/fastapi-users/latest/index

This snippet shows how to install the FastAPI Users library using pip. It's the first step to integrate user management into your FastAPI project.

```bash
pip install fastapi-users
```

--------------------------------

### Create SQLAlchemy User Model and Database Setup

Source: https://fastapi-users.github.io/fastapi-users/latest/configuration/databases/sqlalchemy

Defines a User model inheriting from SQLAlchemyBaseUserTableUUID, sets up an asynchronous engine and session maker for SQLite, and provides functions to create tables and get an async session. It also includes a dependency to get the SQLAlchemyUserDatabase.

```Python
from collections.abc import AsyncGenerator

from fastapi import Depends
from fastapi_users.db import SQLAlchemyBaseUserTableUUID, SQLAlchemyUserDatabase
from sqlalchemy.ext.asyncio import AsyncSession, async_sessionmaker, create_async_engine
from sqlalchemy.orm import DeclarativeBase

DATABASE_URL = "sqlite+aiosqlite:///./test.db"


class Base(DeclarativeBase):
    pass


class User(SQLAlchemyBaseUserTableUUID, Base):
    pass


engine = create_async_engine(DATABASE_URL)
async_session_maker = async_sessionmaker(engine, expire_on_commit=False)


async def create_db_and_tables():
    async with engine.begin() as conn:
        await conn.run_sync(Base.metadata.create_all)


async def get_async_session() -> AsyncGenerator[AsyncSession, None]:
    async with async_sessionmaker() as session:
        yield session


async def get_user_db(session: AsyncSession = Depends(get_async_session)):
    yield SQLAlchemyUserDatabase(session, User)
```

--------------------------------

### Setup FastAPI Users Auth Router

Source: https://fastapi-users.github.io/fastapi-users/latest/configuration/routers/auth

This code snippet demonstrates the basic setup of the FastAPI Users authentication router. It includes importing necessary components, initializing FastAPIUsers with a user manager and authentication backend, and including the generated auth router in the FastAPI application.

```Python
import uuid

from fastapi import FastAPI
from fastapi_users import FastAPIUsers

from .db import User

fastapi_users = FastAPIUsers[User, uuid.UUID](
    get_user_manager,
    [auth_backend],
)

app = FastAPI()
app.include_router(
    fastapi_users.get_auth_router(auth_backend),
    prefix="/auth/jwt",
    tags=["auth"],
)

```

--------------------------------

### Install Dependencies for FastAPI Users SQLAlchemy

Source: https://fastapi-users.github.io/fastapi-users/latest/configuration/oauth

Lists the necessary Python packages to install for using FastAPI Users with SQLAlchemy, including FastAPI, FastAPI Users with SQLAlchemy and OAuth support, and Uvicorn for running the application.

```text
fastapi
fastapi-users[sqlalchemy,oauth]
uvicorn[standard]
aiosqlite
```

--------------------------------

### Install FastAPI Users with OAuth2 and SQLAlchemy

Source: https://fastapi-users.github.io/fastapi-users/latest/configuration/oauth

Installs the fastapi-users library with optional dependencies for SQLAlchemy and OAuth2 support, enabling OAuth2 authentication in your FastAPI application.

```bash
pip'fastapi-users[sqlalchemy,oauth]'
```

--------------------------------

### MongoDB User Database with Beanie ODM

Source: https://fastapi-users.github.io/fastapi-users/latest/migration/9x_to_10x

Demonstrates the implementation of a MongoDB User database using Beanie ODM, including client setup and the `get_user_db` function. It shows the transition from the older MongoDBUserDatabase to BeanieUserDatabase.

```python
import os

import motor.motor_asyncio
from fastapi_users.db import MongoDBUserDatabase

from app.models import UserDB

DATABASE_URL = os.environ["DATABASE_URL"]
client = motor.motor_asyncio.AsyncIOMotorClient(
    DATABASE_URL, uuidRepresentation="standard"
)
db = client["database_name"]
collection = db["users"]


async def get_user_db():
    yield MongoDBUserDatabase(UserDB, collection)
```

```python
import motor.motor_asyncio
from beanie import PydanticObjectId
from fastapi_users.db import BeanieBaseUser, BeanieUserDatabase

DATABASE_URL = "mongodb://localhost:27017"
client = motor.motor_asyncio.AsyncIOMotorClient(
    DATABASE_URL, uuidRepresentation="standard"
)
db = client["database_name"]


class User(BeanieBaseUser[PydanticObjectId]):
    pass


async def get_user_db():
    yield BeanieUserDatabase(User)
```

--------------------------------

### Install FastAPI Users with Beanie

Source: https://fastapi-users.github.io/fastapi-users/latest/installation

Installs the FastAPI Users library with support for Beanie, an ODM for MongoDB, enabling integration with NoSQL databases.

```Shell
pip install "fastapi-users[beanie]"
```

--------------------------------

### FastAPI Users UserManager with UUIDIDMixin

Source: https://fastapi-users.github.io/fastapi-users/latest/configuration/user-manager

Provides an example of creating a `UserManager` dependency for FastAPI applications using `UUIDIDMixin`. This setup includes configuring secrets for password reset and verification tokens, and defining callback methods for user registration and password reset events.

```Python
import uuid
from typing import Optional

from fastapi import Depends, Request
from fastapi_users import BaseUserManager, UUIDIDMixin

from .db import User, get_user_db

SECRET = "SECRET"


class UserManager(UUIDIDMixin, BaseUserManager[User, uuid.UUID]):
    reset_password_token_secret = SECRET
    verification_token_secret = SECRET

    async def on_after_register(self, user: User, request: Optional[Request] = None):
        print(f"User {user.id} has registered.")

    async def on_after_forgot_password(
        self,
        user: User,
        token: str,
        request: Optional[Request] = None,
    ):
        print(f"User {user.id} has forgot their password. Reset token: {token}")

    async def on_after_request_verify(
        self,
        user: User,
        token: str,
        request: Optional[Request] = None,
    ):
        print(f"Verification requested for user {user.id}. Verification token: {token}")


async def get_user_manager(user_db=Depends(get_user_db)):
    yield UserManager(user_db)
```

--------------------------------

### Cookie Transport Example

Source: https://fastapi-users.github.io/fastapi-users/latest/index

This Python code demonstrates how to set up a cookie transport for authentication in FastAPI Users. It includes configuring the cookie name and other relevant parameters.

```python
from fastapi_users.authentication import CookieTransport


cookie_transport = CookieTransport(cookie_name="fastapi-users", cookie_secure=False)

```

--------------------------------

### Install FastAPI Users with OAuth2 and Beanie

Source: https://fastapi-users.github.io/fastapi-users/latest/configuration/oauth

Installs the fastapi-users library with optional dependencies for Beanie ODM and OAuth2 support, facilitating OAuth2 authentication with Beanie in FastAPI.

```bash
pip'fastapi-users[beanie,oauth]'
```

--------------------------------

### FastAPI Application Setup with Beanie Lifespan

Source: https://fastapi-users.github.io/fastapi-users/latest/configuration/full-example

Sets up a FastAPI application with Beanie ODM for MongoDB integration. It includes a lifespan context manager for initializing the Beanie connection and defines routes for authentication and user management.

```Python
from contextlib import asynccontextmanager

from beanie import init_beanie
from fastapi import Depends, FastAPI

from app.db import User, db
from app.schemas import UserCreate, UserRead, UserUpdate
from app.users import auth_backend, current_active_user, fastapi_users


@asynccontextmanager
async def lifespan(app: FastAPI):
    await init_beanie(
        database=db,
        document_models=[
            User,
        ],
    )
    yield


app = FastAPI(lifespan=lifespan)


app.include_router(
    fastapi_users.get_auth_router(auth_backend), prefix="/auth/jwt", tags=["auth"]
)
app.include_router(
    fastapi_users.get_register_router(UserRead, UserCreate),
    prefix="/auth",
    tags=["auth"],
)
app.include_router(
    fastapi_users.get_reset_password_router(),
    prefix="/auth",
    tags=["auth"],
)
app.include_router(
    fastapi_users.get_verify_router(UserRead),
    prefix="/auth",
    tags=["auth"],
)
app.include_router(
    fastapi_users.get_users_router(UserRead, UserUpdate),
    prefix="/users",
    tags=["users"],
)


@app.get("/authenticated-route")
async def authenticated_route(user: User = Depends(current_active_user)):
    return {"message": f"Hello {user.email}!"}
```

--------------------------------

### Beanie MongoDB Database Setup

Source: https://fastapi-users.github.io/fastapi-users/latest/configuration/full-example

Configures the MongoDB connection using Motor and Beanie. It defines the database URL, creates an async client, and sets up a User document model inheriting from BeanieBaseUser and Beanie's Document.

```Python
import motor.motor_asyncio
from beanie import Document
from fastapi_users.db import BeanieBaseUser
from fastapi_users_db_beanie import BeanieUserDatabase

DATABASE_URL = "mongodb://localhost:27017"
client = motor.motor_asyncio.AsyncIOMotorClient(
    DATABASE_URL, uuidRepresentation="standard"
)
db = client["database_name"]


class User(BeanieBaseUser, Document):
    pass


async def get_user_db():
    yield BeanieUserDatabase(User)
```

--------------------------------

### Install Dependencies for FastAPI Users with Beanie

Source: https://fastapi-users.github.io/fastapi-users/latest/configuration/oauth

This snippet lists the necessary Python packages to install for a FastAPI project using FastAPI Users and Beanie ODM. It includes FastAPI, FastAPI Users with Beanie and OAuth support, and Uvicorn for running the application.

```text
fastapi
fastapi-users[beanie,oauth]
uvicorn[standard]
```

--------------------------------

### SQLAlchemyUserDatabase Adapter Instantiation

Source: https://fastapi-users.github.io/fastapi-users/latest/migration/9x_to_10x

Demonstrates the updated instantiation of `SQLAlchemyUserDatabase` in FastAPI Users v10, which now expects the `User` model directly and removes the `UserDB` parameter.

```Python
async def get_user_db(session: AsyncSession = Depends(get_async_session)):
    yield SQLAlchemyUserDatabase(UserDB, session, UserTable)
```

```Python
async def get_user_db(session: AsyncSession = Depends(get_async_session)):
    yield SQLAlchemyUserDatabase(session, User)
```

--------------------------------

### Initialize FastAPIUsers without Schemas

Source: https://fastapi-users.github.io/fastapi-users/latest/migration/9x_to_10x

Demonstrates initializing the FastAPIUsers class without passing Pydantic schemas directly. This is a change from previous versions where schemas were mandatory during initialization.

```python
fastapi_users = FastAPIUsers(
    get_user_manager,
    [auth_backend],
    User,
    UserCreate,
    UserUpdate,
    UserDB,
)
```

```python
fastapi_users = FastAPIUsers[User, uuid.UUID](
    get_user_manager,
    [auth_backend],
)
```

--------------------------------

### SQLAlchemy User Model Example

Source: https://fastapi-users.github.io/fastapi-users/latest/index

This Python code demonstrates how to define a user model using SQLAlchemy for FastAPI Users. It includes essential fields like id, email, and hashed password.

```python
from fastapi_users.db import SQLAlchemyBaseUserTable


class User(SQLAlchemyBaseUserTable):
    pass

```

--------------------------------

### SQLAlchemy Database Models and Setup

Source: https://fastapi-users.github.io/fastapi-users/latest/configuration/oauth

Defines SQLAlchemy models for users and OAuth accounts, sets up the asynchronous database engine, and provides functions for database creation and session management.

```Python
from collections.abc import AsyncGenerator

from fastapi import Depends
from fastapi_users.db import (
    SQLAlchemyBaseOAuthAccountTableUUID,
    SQLAlchemyBaseUserTableUUID,
    SQLAlchemyUserDatabase,
)
from sqlalchemy.ext.asyncio import AsyncSession, async_sessionmaker, create_async_engine
from sqlalchemy.orm import DeclarativeBase, Mapped, relationship

DATABASE_URL = "sqlite+aiosqlite:///./test.db"


class Base(DeclarativeBase):
    pass


class OAuthAccount(SQLAlchemyBaseOAuthAccountTableUUID, Base):
    pass


class User(SQLAlchemyBaseUserTableUUID, Base):
    oauth_accounts: Mapped[list[OAuthAccount]] = relationship(
        "OAuthAccount", lazy="joined"
    )


engine = create_async_engine(DATABASE_URL)
async_session_maker = async_sessionmaker(engine, expire_on_commit=False)


async def create_db_and_tables():
    async with engine.begin() as conn:
        await conn.run_sync(Base.metadata.create_all)


async def get_async_session() -> AsyncGenerator[AsyncSession, None]:
    async with async_session_maker() as session:
        yield session


async def get_user_db(session: AsyncSession = Depends(get_async_session)):
    yield SQLAlchemyUserDatabase(session, User, OAuthAccount)
```

--------------------------------

### Bearer Transport Example

Source: https://fastapi-users.github.io/fastapi-users/latest/index

This Python code illustrates how to configure a Bearer token transport for authentication with FastAPI Users. It specifies the authorization header name.

```python
from fastapi_users.authentication import BearerTransport


bearer_transport = BearerTransport(tokenUrl="/auth/jwt/login")

```

--------------------------------

### Beanie User Model Example

Source: https://fastapi-users.github.io/fastapi-users/latest/index

This Python code illustrates how to define a user model using Beanie ODM for FastAPI Users. It showcases the structure required for MongoDB integration.

```python
from fastapi_users.db import BeanieBaseUser


class User(BeanieBaseUser):
    pass

```

--------------------------------

### Update User ID Comparison in Python

Source: https://fastapi-users.github.io/fastapi-users/latest/migration/08_to_1x

Demonstrates how to correctly compare user IDs in Python code after migrating to UUIDs. The example shows the 'before' and 'after' states for asserting equality.

```python
# Before
assert "d35d213e-f3d8-4f08-954a-7e0d1bea286f" == user.id

# Now
assert "d35d213e-f3d8-4f08-954a-7e0d1bea286f" == str(user.id)
```

--------------------------------

### Convert JWTAuthentication Backend (Python)

Source: https://fastapi-users.github.io/fastapi-users/latest/migration/8x_to_9x

Demonstrates the conversion of a JWTAuthentication backend from FastAPI Users v8 to v9. The new approach separates transport and strategy, requiring explicit definition of both.

```Python
from fastapi_users.authentication import JWTAuthentication

jwt_authentication = JWTAuthentication(
    secret=SECRET, lifetime_seconds=3600, tokenUrl="auth/jwt/login"
)
```

```Python
from fastapi_users.authentication import AuthenticationBackend, BearerTransport, JWTStrategy

SECRET = "SECRET"

bearer_transport = BearerTransport(tokenUrl="auth/jwt/login")

def get_jwt_strategy() -> JWTStrategy:
    return JWTStrategy(secret=SECRET, lifetime_seconds=3600)

auth_backend = AuthenticationBackend(
    name="jwt",
    transport=bearer_transport,
    get_strategy=get_jwt_strategy,
)
```

--------------------------------

### Convert CookieAuthentication Backend (Python)

Source: https://fastapi-users.github.io/fastapi-users/latest/migration/8x_to_9x

Illustrates the migration of a CookieAuthentication backend from FastAPI Users v8 to v9. The update involves creating a CookieTransport and a strategy, then combining them into an AuthenticationBackend.

```Python
from fastapi_users.authentication import CookieAuthentication

cookie_authentication = CookieAuthentication(secret=SECRET, lifetime_seconds=3600)
```

```Python
from fastapi_users.authentication import AuthenticationBackend, CookieTransport, JWTStrategy

SECRET = "SECRET"

cookie_transport = CookieTransport(cookie_max_age=3600)

def get_jwt_strategy() -> JWTStrategy:
    return JWTStrategy(secret=SECRET, lifetime_seconds=3600)

auth_backend = AuthenticationBackend(
    name="cookie",
    transport=cookie_transport,
    get_strategy=get_jwt_strategy,
)
```

--------------------------------

### Renaming Pydantic Models to Schemas

Source: https://fastapi-users.github.io/fastapi-users/latest/migration/9x_to_10x

Explains the change in terminology from Pydantic models to schemas in FastAPI Users and demonstrates the updated schema definitions, including the generic type for user IDs.

```python
from fastapi_users import models


class User(models.BaseUser):
    pass


class UserCreate(models.BaseUserCreate):
    pass


class UserUpdate(models.BaseUserUpdate):
    pass


class UserDB(User, models.BaseUserDB):
    pass
```

```python
import uuid

from fastapi_users import schemas


class UserRead(schemas.BaseUser[uuid.UUID]):
    pass


class UserCreate(schemas.BaseUserCreate):
    pass


class UserUpdate(schemas.BaseUserUpdate):
    pass
```

--------------------------------

### Get Current Active Superuser

Source: https://fastapi-users.github.io/fastapi-users/latest/usage/current-user

Provides an example of retrieving users who are active and possess superuser privileges. Non-superusers will be denied access with a 403 Forbidden error.

```Python
current_superuser = fastapi_users.current_user(active=True, superuser=True)

@app.get("/protected-route")
def protected_route(user: User = Depends(current_superuser)):
    return f"Hello, {user.email}"
```

--------------------------------

### Serve Documentation Locally with Hatch

Source: https://fastapi-users.github.io/fastapi-users/latest/index

This command serves the project's documentation locally, making it accessible via a web browser. The documentation will be available at http://localhost:8000.

```bash
hatch
```

--------------------------------

### Setup FastAPI Verify Router

Source: https://fastapi-users.github.io/fastapi-users/latest/configuration/routers/verify

This snippet shows how to set up and include the verify router from FastAPI Users in a FastAPI application. It demonstrates the necessary imports, initialization of FastAPIUsers, and inclusion of the verify router with a specified schema and prefix.

```Python
import uuid

from fastapi import FastAPI
from fastapi_users import FastAPIUsers

from .db import User
from .schemas import UserRead

fastapi_users = FastAPIUsers[User, uuid.UUID](
    get_user_manager,
    [auth_backend],
)

app = FastAPI()
app.include_router(
    fastapi_users.get_verify_router(UserRead),
    prefix="/auth",
    tags=["auth"],
)

```

--------------------------------

### Include Routers with Schema Initialization

Source: https://fastapi-users.github.io/fastapi-users/latest/migration/9x_to_10x

Shows how to include various routers from FastAPIUsers, including the updated method of passing Pydantic schemas (e.g., UserRead, UserCreate) during router initialization for functionalities like registration and user retrieval.

```python
app.include_router(
    fastapi_users.get_auth_router(auth_backend), prefix="/auth/jwt", tags=["auth"]
)
app.include_router(fastapi_users.get_register_router(), prefix="/auth", tags=["auth"])
app.include_router(
    fastapi_users.get_reset_password_router(),
    prefix="/auth",
    tags=["auth"],
)
app.include_router(
    fastapi_users.get_verify_router(),
    prefix="/auth",
    tags=["auth"],
)
app.include_router(fastapi_users.get_users_router(), prefix="/users", tags=["users"])
```

```python
app.include_router(
    fastapi_users.get_auth_router(auth_backend), prefix="/auth/jwt", tags=["auth"]
)
app.include_router(
    fastapi_users.get_register_router(UserRead, UserCreate),
    prefix="/auth",
    tags=["auth"],
)
app.include_router(
    fastapi_users.get_reset_password_router(),
    prefix="/auth",
    tags=["auth"],
)
app.include_router(
    fastapi_users.get_verify_router(UserRead),
    prefix="/auth",
    tags=["auth"],
)
app.include_router(
    fastapi_users.get_users_router(UserRead, UserUpdate),
    prefix="/users",
    tags=["users"])
```

--------------------------------

### Get Current User (Active or Not)

Source: https://fastapi-users.github.io/fastapi-users/latest/usage/current-user

Demonstrates how to get the current user, regardless of their active status. This is useful for accessing user information even if the account is inactive.

```Python
current_user = fastapi_users.current_user()

@app.get("/protected-route")
def protected_route(user: User = Depends(current_user)):
    return f"Hello, {user.email}"
```

--------------------------------

### FastAPI Users Overview

Source: https://fastapi-users.github.io/fastapi-users/latest/configuration/overview

This section provides a high-level overview of the FastAPI Users library's structure and how its components fit together. It highlights key areas such as user models, database adapters, authentication backends, UserManager, schemas, and the FastAPIUsers class itself.

```Markdown
# Overview

The schema below shows you how the library is structured and how each part fit together.
## User model and database adapters
FastAPI Users is compatible with various **databases and ORM**. To build the interface between those database tools and the library, we provide database adapters classes that you need to instantiate and configure.
➡️ I'm using SQLAlchemy
➡️ I'm using Beanie
## Authentication backends
Authentication backends define the way users sessions are managed in your app, like access tokens or cookies.
They are composed of two parts: a **transport** , which is how the token will be carried over the requests (e.g. cookies, headers...) and a **strategy** , which is how the token will be generated and secured (e.g. a JWT, a token in database...). 
➡️ Configure the authentication backends
##  `UserManager`
The `UserManager` object bears most of the logic of FastAPI Users: registration, verification, password reset... We provide a `BaseUserManager` with this common logic; which you should overload to define how to validate passwords or handle events.
This `UserManager` object should be provided through a FastAPI dependency, `get_user_manager`.
➡️ Configure `UserManager`
## Schemas
FastAPI is heavily using Pydantic models to validate request payloads and serialize responses. **FastAPI Users** is no exception and will expect you to provide Pydantic schemas representing a user when it's read, created and updated.
➡️ Configure schemas
##  `FastAPIUsers` and routers
Finally, `FastAPIUsers` object is the main class from which you'll be able to generate routers for classic routes like registration or login, but also get the `current_user` dependency factory to inject the authenticated user in your own routes.
➡️ Configure `FastAPIUsers` and routers
```

--------------------------------

### Get Current Active User

Source: https://fastapi-users.github.io/fastapi-users/latest/usage/current-user

Shows how to retrieve only active users. If the authenticated user is inactive, a 401 Unauthorized error will be raised.

```Python
current_active_user = fastapi_users.current_user(active=True)

@app.get("/protected-route")
def protected_route(user: User = Depends(current_active_user)):
    return f"Hello, {user.email}"
```

--------------------------------

### Login Response Example

Source: https://fastapi-users.github.io/fastapi-users/latest/configuration/authentication/transports/bearer

This is an example of a successful login response when using the Bearer transport. It returns a JSON object with an access_token and token_type.

```JSON
{
"access_token":"eyJ0eXAiOiJKV1QiLCJhbGciOiJIUzI1NiJ9.eyJ1c2VyX2lkIjoiOTIyMWZmYzktNjQwZi00MzcyLTg2ZDMtY2U2NDJjYmE1NjAzIiwiYXVkIjoiZmFzdGFwaS11c2VyczphdXRoIiwiZXhwIjoxNTcxNTA0MTkzfQ.M10bjOe45I5Ncu_uXvOmVV8QxnL-nZfcH96U90JaocI",
"token_type":"bearer"
}
```

--------------------------------

### Get Current Active and Verified User

Source: https://fastapi-users.github.io/fastapi-users/latest/usage/current-user

Illustrates how to fetch users who are both active and verified. Users who are not verified will receive a 403 Forbidden error.

```Python
current_active_verified_user = fastapi_users.current_user(active=True, verified=True)

@app.get("/protected-route")
def protected_route(user: User = Depends(current_active_verified_user)):
    return f"Hello, {user.email}"
```

--------------------------------

### Run Unit Tests with Hatch

Source: https://fastapi-users.github.io/fastapi-users/latest/index

This command executes all unit tests for the project using the Hatch build and environment manager. It ensures the codebase adheres to the expected quality standards.

```bash
hatch
```

--------------------------------

### Provide Database Adapter via Dependency (Python)

Source: https://fastapi-users.github.io/fastapi-users/latest/migration/7x_to_8x

In FastAPI Users v8.x.x, the database adapter should be instantiated within a custom dependency, leveraging FastAPI's dependency injection system for more dynamic instance creation, rather than direct instantiation.

```python
from fastapi import Depends
from fastapi_users.db import SQLAlchemyUserDatabase

def get_user_db():
    # Assuming you have a SQLAlchemy session setup
    yield SQLAlchemyUserDatabase(session, User)

# Usage in FastAPIUsers initialization:
# fastapi_users = FastAPIUsers(get_user_db, ...)
```

--------------------------------

### Get Authenticated User Profile (axios)

Source: https://fastapi-users.github.io/fastapi-users/latest/usage/flow

This JavaScript code snippet uses axios to make a GET request to the /users/me endpoint. It includes an Authorization header with a Bearer token to authenticate the request and retrieve the user's profile data.

```javascript
const TOKEN='eyJ0eXAiOiJKV1QiLCJhbGciOiJIUzI1NiJ9.eyJ1c2VyX2lkIjoiNGZkMzQ3N2ItZWNjZi00ZWUzLThmN2QtNjhhZDcyMjYxNDc2IiwiYXVkIjoiZmFzdGFwaS11c2VyczphdXRoIiwiZXhwIjoxNTg3ODE4NDI5fQ.anO3JR8-WYCozZ4_2-PQ2Ov9O38RaLP2RAzQIiZhteM';
axios.get(
'http://localhost:8000/users/me',{
headers:{
'Authorization':`Bearer ${TOKEN}`,
},
})
.then((response)=>console.log(response))
.catch((error)=>console.log(error));
```

--------------------------------

### FastAPI Users Manager and Authentication Backend

Source: https://fastapi-users.github.io/fastapi-users/latest/configuration/full-example

Configures the UserManager, JWT authentication backend, and FastAPIUsers instance. It includes handlers for user registration, password reset, and verification events.

```Python
import uuid
from typing import Optional

from fastapi import Depends, Request
from fastapi_users import BaseUserManager, FastAPIUsers, UUIDIDMixin, models
from fastapi_users.authentication import (
    AuthenticationBackend,
    BearerTransport,
    JWTStrategy,
)
from fastapi_users.db import SQLAlchemyUserDatabase

from app.db import User, get_user_db

SECRET = "SECRET"


class UserManager(UUIDIDMixin, BaseUserManager[User, uuid.UUID]):
    reset_password_token_secret = SECRET
    verification_token_secret = SECRET

    async def on_after_register(self, user: User, request: Optional[Request] = None):
        print(f"User {user.id} has registered.")

    async def on_after_forgot_password(
        self, user: User, token: str, request: Optional[Request] = None
    ):
        print(f"User {user.id} has forgot their password. Reset token: {token}")

    async def on_after_request_verify(
        self, user: User, token: str, request: Optional[Request] = None
    ):
        print(f"Verification requested for user {user.id}. Verification token: {token}")


def get_user_manager(user_db: SQLAlchemyUserDatabase = Depends(get_user_db)):
    yield UserManager(user_db)


bearer_transport = BearerTransport(tokenUrl="auth/jwt/login")

def get_jwt_strategy() -> JWTStrategy[models.UP, models.ID]:
    return JWTStrategy(secret=SECRET, lifetime_seconds=3600)


auth_backend = AuthenticationBackend(
    name="jwt",
    transport=bearer_transport,
    get_strategy=get_jwt_strategy,
)

fastapi_users = FastAPIUsers[User, uuid.UUID](get_user_manager, [auth_backend])

current_active_user = fastapi_users.current_user(active=True)
```

--------------------------------

### Run Uvicorn Server

Source: https://fastapi-users.github.io/fastapi-users/latest/configuration/full-example

A simple Python script to run the FastAPI application using Uvicorn. It specifies the application module and host for the server.

```Python
import uvicorn

if __name__ == "__main__":
    uvicorn.run("app.app:app", host="0.0.0.0", log_level="info")
```

--------------------------------

### Get User by ID

Source: https://fastapi-users.github.io/fastapi-users/latest/usage/routes

Retrieves a specific user by their ID. Requires authentication and authorization (superuser status). Returns 404 if the user is not found.

```python
GET /{user_id}

Responses:
`200 OK`
```json
{
"id":"57cbb51a-ab71-4009-8802-3f54b4f2e23",
"email":"king.arthur@camelot.bt",
"is_active":true,
"is_superuser":false
}
```

`401 Unauthorized`: Missing token or inactive user.
`403 Forbidden`: Not a superuser.
`404 Not found`: The user does not exist.
```

--------------------------------

### Run FastAPI Application with Uvicorn

Source: https://fastapi-users.github.io/fastapi-users/latest/configuration/full-example

A Python script to run the FastAPI application using Uvicorn. It specifies the application module and host for the server.

```Python
import uvicorn

if __name__ == "__main__":
    uvicorn.run("app.app:app", host="0.0.0.0", log_level="info")
```

--------------------------------

### Get Current User

Source: https://fastapi-users.github.io/fastapi-users/latest/usage/routes

Retrieves the details of the currently authenticated active user. Returns a 401 Unauthorized error if the token is missing or the user is inactive.

```python
GET /me

Responses:
`200 OK`
```json
{
"id":"57cbb51a-ab71-4009-8802-3f54b4f2e23",
"email":"king.arthur@camelot.bt",
"is_active":true,
"is_superuser":false
}
```

`401 Unauthorized`: Missing token or inactive user.
```

--------------------------------

### Authenticate with Bearer Token

Source: https://fastapi-users.github.io/fastapi-users/latest/configuration/authentication/transports/bearer

This example demonstrates how to make an authenticated request using the Bearer token in the Authorization header. The token is prefixed with 'Bearer '.

```Bash
curl'Authorization: Bearer eyJ0eXAiOiJKV1QiLCJhbGciOiJIUzI1NiJ9.eyJ1c2VyX2lkIjoiOTIyMWZmYzktNjQwZi00MzcyLTg2ZDMtY2U2NDJjYmE1NjAzIiwiYXVkIjoiZmFzdGFwaS11c2VyczphdXRoIiwiZXhwIjoxNTcxNTA0MTkzfQ.M10bjOe45I5Ncu_uXvOmVV8QxnL-nZfcH96U90JaocI'
```

--------------------------------

### FastAPI Application Setup with Beanie Lifespan

Source: https://fastapi-users.github.io/fastapi-users/latest/configuration/oauth

This Python code sets up a FastAPI application, including integrating Beanie ODM for database initialization via an async context manager lifespan. It includes routers for authentication, user management, and an OAuth flow with Google.

```python
from contextlib import asynccontextmanager

from beanie import init_beanie
from fastapi import Depends, FastAPI

from app.db import User, db
from app.schemas import UserCreate, UserRead, UserUpdate
from app.users import (
    SECRET,
    auth_backend,
    current_active_user,
    fastapi_users,
    google_oauth_client,
)


@asynccontextmanager
async def lifespan(app: FastAPI):
    await init_beanie(
        database=db,
        document_models=[
            User,
        ],
    )
    yield


app = FastAPI(lifespan=lifespan)

app.include_router(
    fastapi_users.get_auth_router(auth_backend), prefix="/auth/jwt", tags=["auth"]
)
app.include_router(
    fastapi_users.get_register_router(UserRead, UserCreate),
    prefix="/auth",
    tags=["auth"],
)
app.include_router(
    fastapi_users.get_reset_password_router(),
    prefix="/auth",
    tags=["auth"],
)
app.include_router(
    fastapi_users.get_verify_router(UserRead),
    prefix="/auth",
    tags=["auth"],
)
app.include_router(
    fastapi_users.get_users_router(UserRead, UserUpdate),
    prefix="/users",
    tags=["users"],
)
app.include_router(
    fastapi_users.get_oauth_router(google_oauth_client, auth_backend, SECRET),
    prefix="/auth/google",
    tags=["auth"],
)


@app.get("/authenticated-route")
async def authenticated_route(user: User = Depends(current_active_user)):
    return {"message": f"Hello {user.email}!"}
```

--------------------------------

### Update SQLAlchemy Dependency

Source: https://fastapi-users.github.io/fastapi-users/latest/migration/9x_to_10x

This snippet shows the change in the FastAPI Users SQLAlchemy dependency from `fastapi-users[sqlalchemy2]` to `fastapi-users[sqlalchemy]` for version 10.x.x.

```Python
fastapi-users[sqlalchemy2]
uvicorn[standard]
aiosqlite
```

```Python
fastapi-users[sqlalchemy]
uvicorn[standard]
aiosqlite
```

--------------------------------

### Remove authentication_backend from /authorize URL (Bash)

Source: https://fastapi-users.github.io/fastapi-users/latest/migration/8x_to_9x

Demonstrates the change in the `/authorize` endpoint for OAuth. In v9, the `authentication_backend` query parameter is no longer required.

```Bash
curl\
-H"Content-Type: application/json"\
-X\ 
http://localhost:8000/auth/google/authorize?authentication_backend=jwt
```

```Bash
curl\
-H"Content-Type: application/json"\
-X\ 
http://localhost:8000/auth/google/authorize
```

--------------------------------

### SQLAlchemy Database Configuration

Source: https://fastapi-users.github.io/fastapi-users/latest/configuration/full-example

Defines the SQLAlchemy database models, including the User table inheriting from SQLAlchemyBaseUserTableUUID, and sets up asynchronous database sessions using SQLite.

```Python
from collections.abc import AsyncGenerator

from fastapi import Depends
from fastapi_users.db import SQLAlchemyBaseUserTableUUID, SQLAlchemyUserDatabase
from sqlalchemy.ext.asyncio import AsyncSession, async_sessionmaker, create_async_engine
from sqlalchemy.orm import DeclarativeBase

DATABASE_URL = "sqlite+aiosqlite:///./test.db"


class Base(DeclarativeBase):
    pass


class User(SQLAlchemyBaseUserTableUUID, Base):
    pass


engine = create_async_engine(DATABASE_URL)
async_session_maker = async_sessionmaker(engine, expire_on_commit=False)


async def create_db_and_tables():
    async with engine.begin() as conn:
        await conn.run_sync(Base.metadata.create_all)


async def get_async_session() -> AsyncGenerator[AsyncSession, None]:
    async with async_session_maker() as session:
        yield session


async def get_user_db(session: AsyncSession = Depends(get_async_session)):
    yield SQLAlchemyUserDatabase(session, User)
```

--------------------------------

### JWT Authentication Strategy Example

Source: https://fastapi-users.github.io/fastapi-users/latest/index

This Python code snippet shows how to configure a JWT authentication strategy for FastAPI Users. It involves creating a JWTStrategy instance with a secret key.

```python
from fastapi_users.authentication import JWTStrategy


SECRET = "your-secret-key"

def get_jwt_strategy() -> JWTStrategy:
    return JWTStrategy(secret=SECRET, lifetime_seconds=3600)

```