Added a note regarding django.contrib.auth.authenticate.

            # the authentication system was unable to verify the username and password

            print("The username and password were incorrect.")

    .. note::

        This is a low level way to authenticate a set of credentials; for

        example, it's used by the

        :class:`~django.contrib.auth.middleware.RemoteUserMiddleware`. Unless

        you are writing your own authentication system, you probably won't use

        this. Rather if you are looking for a way to limit access to logged in

        users, see the :func:`~django.contrib.auth.decorators.login_required`

        decorator.

.. _topic-authorization:

Permissions and Authorization