I wanna receive messages from a specific Group Topic, Topics end their ID’s with a _[number] but I don’t know how I can make that work in this case, i’ve tried it like this and this doesn’t work.

Does anyone have an idea how I can fix this? Thanks

from telethon import TelegramClient, events

api_id = 
api_hash = ''
phone_number = ''
source_chat_ids = [100123456789, 100987654321_13]
specific_user_ids = [xyx, yxy]  # Voeg hier de gebruikers-IDs toe
history = []
client = TelegramClient('session_name', api_id, api_hash)

async def send_telegram_message(message):
    await client.send_message(xxx, message)

async def main():
    await client.start(phone=phone_number)
    print("Client is gestart")

    @client.on(events.NewMessage(chats=source_chat_ids))
    async def handler(event):
        if event.sender_id in specific_user_ids:

            if event.message.message not in history:
                message = event.message.message

                history.append(message)
            
                await send_telegram_message(message)

    print("Listening for messages...")
    await client.run_until_disconnected()

with client:
    client.loop.run_until_complete(main())

That simply adding the _XYZ to the id would work