Как удалить уведомления про новых пользователей в телеграм каналах?

from telethon import TelegramClient, events
api_id =        ************
api_hash =     "************************************"
target_chat =   ****************

client = TelegramClient('my_account11', api_id, api_hash)
text1 = "MessageActionChatDeleteUser"
text2 = "MessageActionChatAddUser"

@client.on(events.chataction.ChatAction)
async def my_event_handler(event):
    #print(event)
    patt = str(event.action_message.action)
    try:
        if text1 in patt:
            id_todel = event.action_message.id
            await client.delete_messages(target_chat, message_ids=id_todel)
            print("User left delited")
        elif text2 in patt:
            id_todel = event.action_message.id
            await client.delete_messages(target_chat, message_ids=id_todel)
            print("User add delited")
    except Exception as e:
        print("Error: ", e)

client.start()
client.run_until_disconnected()