### Sign in with /v3/login

Source: https://developer.bill.com/reference/api-reference-overview

Use this cURL request to authenticate in the API sandbox environment. Ensure the content-type header is set to application/json.

```curl
curl --request POST \
--url 'https://gateway.stage.bill.com/connect/v3/login' \
--header 'content-type: application/json' \
--data '{
  "username": "{username}", 
  "password": "{password}",
  "organizationId": "{organization_id}", 
  "devKey": "{developer_key}"
}'
```

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

### POST /v3/login

Source: https://developer.bill.com/reference/api-reference-overview

Authenticates a user with the BILL developer account to initiate an API session.

```APIDOC
## POST /v3/login

### Description
Signs in to the BILL developer account to establish an API session. This is a prerequisite for performing further API operations.

### Method
POST

### Endpoint
https://gateway.stage.bill.com/connect/v3/login

### Parameters
#### Request Body
- **username** (string) - Required - The email address used to sign in to the BILL developer account.
- **password** (string) - Required - The password for the BILL developer account.
- **organizationId** (string) - Required - The unique alphanumeric ID of the BILL organization.
- **devKey** (string) - Required - The developer key used to identify the developer account.

### Request Example
{
  "username": "{username}",
  "password": "{password}",
  "organizationId": "{organization_id}",
  "devKey": "{developer_key}"
}

### Response
#### Success Response (200)
- **sessionId** (string) - The generated session ID for the authenticated session.
- **organizationId** (string) - The ID of the organization.
- **userId** (string) - The BILL-generated ID of the signed-in user.
- **trusted** (boolean) - Indicates if the session is trusted.

#### Response Example
{
  "sessionId": "{session_id}",
  "organizationId": "{organization_id}",
  "userId": "{user_id}",
  "trusted": false
}
```

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

### API login response

Source: https://developer.bill.com/reference/api-reference-overview

The successful login response returns a sessionId, organizationId, and userId. The sessionId is required for subsequent API calls.

```json
{
    "sessionId": "{session_id}",
    "organizationId": "{organization_id}",
    "userId": "{user_id}",
    "trusted": false

}
```

=== COMPLETE CONTENT === This response contains all available snippets from this library. No additional content exists. Do not make further requests.