How to use the spotipy.spotify_token function in spotipy

else:
                            logging.error(
                                "ACTION------ YouTube not availble on Google Cast Audio")

                elif app == 'spotify':  # app=spotify|cmd=launch_app|user=XXXXXX|pass=YYYY|value
                    if cmd == 'NONE':
                        cmd = 'play_media'
                    possibleCmd = ['play_media']
                    if cmd == 'play_media':
                        fallbackMode = False

                        keepGoing = True
                        if 'spdc' in command and 'spkey' in command:
                            spdc = command['spdc']
                            spkey = command['spkey']
                            data = stoken.start_session(spdc, spkey)
                            access_token = data[0]
                            expires = data[1] - int(time.time())
                        else:
                            logging.error(
                                "ACTION------ Missing spdc and/or spkey")
                            keepGoing = False

                        if value is None:
                            logging.error(
                                "ACTION------ Missing content id for spotify")
                            keepGoing = False

                        if keepGoing is True:
                            player = jcast.loadPlayer(
                                app, {'quitapp': quit_app_before, 'wait': wait})
                            player.launch_app(access_token, expires)