Callback called whenever the login or sign up process completes.

        Returns the input user parameter.

def _on_login(self, user):
        """
        Callback called whenever the login or sign up process completes.

        Returns the input user parameter.
        """
        self._bot = bool(user.bot)
        self._self_input_peer = utils.get_input_peer(user, allow_self=False)
        self._authorized = True

        return user