AttributeError: 'CheckingClient' object has no attribute 'logout' - python-3.x

Question

I wanted to turn the discord, but it gives an error.
I found a bot on the Internet, I wanted to take it as a basis, and add various functions in the future. But I downloaded everything, inserted the token and made the first launch and an error.
link to code - https://github.com/sergree/DolboNet
the error itself -
ERROR discord.client Ignoring exception in on_ready
Traceback (most recent call last):
File "C:\Users\alexe\AppData\Local\Programs\Python\Python310\lib\site-packages\discord\client.py", line 409, in _run_event
await coro(*args, **kwargs)
File "C:\Users\alexe\Desktop\DolboNet-master\core\checking_client.py", line 13, in on_ready
await self.logout()
AttributeError: 'CheckingClient' object has no attribute 'logout'
import discord
from core.checking_client import CheckingClient
import config
from utils.tprint import log
import asyncio
log("Проверяю Discord токен...")
checking_client = CheckingClient(intents=discord.Intents.none())
login_successful = False
try:
checking_client.run(config.token)
login_successful = True
except discord.errors.LoginFailure:
log("НЕВЕРНЫЙ DISCORD ТОКЕН! Необходимо отредактировать файл config.py!")
if login_successful:
log("Discord токен проверен.")
asyncio.set_event_loop(asyncio.new_event_loop())
from core.main_client import MainClient
intents = discord.Intents.none()
intents.guilds = True
intents.guild_messages = True
intents.emojis = True
main_client = MainClient(intents=intents)
main_client.run(config.token)
Thanks for the help!