# Login For Access Token

Authenticates a user and returns an access token (JWT).

Endpoint: POST /auth/login
Version: 0.1.0

## Request fields (application/json):

  - `username` (string, required)
    Example: "john.doe"

  - `password` (string, required)
    Example: "secure_password_123"

## Response 200 fields (application/json):

  - `access_token` (string, required)
    Example: "eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9..."

  - `token_type` (string)
    Example: "bearer"

## Response 422 fields (application/json):

  - `detail` (array)

  - `detail.loc` (array, required)

  - `detail.msg` (string, required)

  - `detail.type` (string, required)