Loads user data from service

def user_data(self, access_token, *args, **kwargs):
        """Loads user data from service"""
        url = '{}/userinfo'.format(self.BASE_URL)
        response = self.get_json(
            url,
            headers={'Authorization': 'Bearer ' + access_token},
        )
        self.check_correct_audience(response['audience'])

        userdata = response['user']
        return userdata