Clarify meaning of models.User.is_authenticated()

        Always returns ``True`` (as opposed to

        ``AnonymousUser.is_authenticated()`` which always returns ``False``).

        This is a way to tell if the user has been authenticated. This does not

        imply any permissions, and doesn't check if the user is active - it

        only indicates that ``request.user`` has been populated by the

        :class:`~django.contrib.auth.middleware.AuthenticationMiddleware` with

        a :class:`~django.contrib.auth.models.User` object representing the

        currently logged-in user.

        imply any permissions, and doesn't check if the user is active or has

        a valid session. Even though normally you will call this method on

        ``request.user`` to find out whether it has been populated by the

        :class:`~django.contrib.auth.middleware.AuthenticationMiddleware`

        (representing the currently logged-in user), you should know this method

        returns ``True`` for any :class:`~django.contrib.auth.models.User`

        instance.

    .. method:: get_full_name()