### Install jwt-go Package

Source: https://golang-jwt.github.io/jwt

Use this command to add `jwt-go` as a dependency in your Go program. Ensure you have Go installed.

```bash
go get -u github.com/golang-jwt/jwt/v5

```

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

### Import jwt-go Package

Source: https://golang-jwt.github.io/jwt

Import the `jwt-go` library into your Go code after installation.

```go
import "github.com/golang-jwt/jwt/v5"

```

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

### Create JWT with Additional Claims (ES256)

Source: https://golang-jwt.github.io/jwt/usage/create

Use jwt.NewWithClaims to create a token with custom claims, such as issuer, subject, and other metadata. The signing method and key type must match.

```go
var (
  key *ecdsa.PrivateKey
  t   *jwt.Token
  s   string
)

key = /* Load key from somewhere, for example a file */
t = jwt.NewWithClaims(jwt.SigningMethodES256, 
  jwt.MapClaims{ 
    "iss": "my-auth-server", 
    "sub": "john", 
    "foo": 2, 
  })
s = t.SignedString(key) 

```

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

### Create JWT with Asymmetric Signing Method (ES256)

Source: https://golang-jwt.github.io/jwt/usage/create

Use jwt.New with jwt.SigningMethodES256 for asymmetric signing. The private key must be kept secret.

```go
var (
  key *ecdsa.PrivateKey
  t   *jwt.Token
  s   string
)

key = /* Load key from somewhere, for example a file */
t = jwt.New(jwt.SigningMethodES256) 
s = t.SignedString(key) 

```

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

### Create JWT with Symmetric Signing Method (HS256)

Source: https://golang-jwt.github.io/jwt/usage/create

Use jwt.New with jwt.SigningMethodHS256 for symmetric signing. Ensure the key is securely loaded and protected.

```go
var (
  key []byte
  t   *jwt.Token
  s   string
)

key = /* Load key from somewhere, for example an environment variable */
t = jwt.New(jwt.SigningMethodHS256) 
s = t.SignedString(key) 

```

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