Invoked as a callback when self.stackexchange_request returns the
        response to the request for user data.

        :param method future: The callback method to pass along
        :param str access_token: The access token for the user's use
        :param dict response: The HTTP response already decoded

def _on_stackexchange_user(self, future, access_token, response):
        """Invoked as a callback when self.stackexchange_request returns the
        response to the request for user data.

        :param method future: The callback method to pass along
        :param str access_token: The access token for the user's use
        :param dict response: The HTTP response already decoded

        """
        response['access_token'] = access_token
        future.set_result(response)