How to end a function?

Question

Python

async def say(akk,audio,chat):
    async with telethon.TelegramClient(akk,api_id,api_hash) as client:

        @group_call.on_playout_ended
        async def audio_ended(gc, source):
            # Сдесь нужно завершыть функцыю say
                
        await pyrogram.idle()