Just iterates over your dialogs in Telegram and prints the name of the dialog and it's ID

main.py

import asyncio
from pyrogram import Client

# Replace with your API credentials
api_id = 1
api_hash = '1'


async def main():
    async with Client("chat_iterator", api_id, api_hash) as app:
        async for dialog in app.get_dialogs():
            print(dialog.chat.title or dialog.chat.first_name, dialog.chat.id)


asyncio.run(main())