from telethon import TelegramClient, events
import pathlib

# Remember to use your own values from my.telegram.org!
api_id = 12345
api_hash = '0123456789abcdef0123456789abcdef'

# Replace the checkin bot and text with yourown
checkin_at_bot_id =  '@checkin_bot'
checkin_text = '/checkin'

# where to save the login session
session_name = pathlib.Path.home() / '.tg-auto-checkin'
client = TelegramClient(str(session_name), api_id, api_hash)

# handle reply message from checkin_bot
@client.on(events.NewMessage(chats=checkin_at_bot_id))
async def handler(event):
    print(event.message.text)
    await client.disconnect()

async def main():
    # Getting information about yourself
    # me = await client.get_me()

    # "me" is a user object. You can pretty-print
    # any Telegram object with the "stringify" method:
    # print(me.stringify())
    await client.send_message(checkin_at_bot_id, checkin_text)
    # disconnet after handle the reply message from checkin_bot
    await client.run_until_disconnected()

if __name__ == '__main__':
    with client:
        client.loop.run_until_complete(main())