def _add_custom_values_to_token_info(self, token_info):
        """
        Store some values that aren't directly provided by a Web API
        response.
        """
        token_info["expires_at"] = int(time.time()) + token_info["expires_in"]
        token_info["scope"] = self.scope
        return token_info

        Store some values that aren't directly provided by a Web API
        response.
        
spotipy/oauth2.py