Authentication

class AuthenticationBackend:
    """Base class for implementing the Authentication into SQLAdmin.
    You need to inherit this class and override the methods:
    `login`, `logout` and `authenticate`.
    """

    def __init__(self, secret_key: str) -> None:
        from starlette.middleware.sessions import SessionMiddleware

        self.middlewares = [
            Middleware(SessionMiddleware, secret_key=secret_key),
        ]

    async def login(self, request: Request) -> bool:
        """Implement login logic here.
        You can access the login form data `await request.form()`
        andvalidate the credentials.
        """
        raise NotImplementedError()

    async def logout(self, request: Request) -> Response | bool:
        """Implement logout logic here.
        This will usually clear the session with `request.session.clear()`.

        If a `Response` or `RedirectResponse` is returned,
        that response is returned to the user,
        otherwise the user will be redirected to the index page.
        """
        raise NotImplementedError()

    async def authenticate(self, request: Request) -> Response | bool:
        """Implement authenticate logic here.
        This method will be called for each incoming request
        to validate the authentication.

        If a `Response` or `RedirectResponse` is returned,
        that response is returned to the user,
        otherwise a True/False is expected.
        """
        raise NotImplementedError()