При попытке отправить сообщение происходит такая ошибка
Код
 class BOT(object):
    token = config.token
    admin = 'admin'
    def __init__(self):
        self.bot = twx.botapi.TelegramBot(self.token)
        self.bot.get_me()
        last_updates = self.bot.get_updates(offset=0).wait()
        try:
            self.last_update_id = list(last_updates)[-1].update_id
        except IndexError:
            self.last_update_id = None
        print('last update id: {0}'.format(self.last_update_id))
    def process_message(self, message,user):
        text = message.message.text
        chat = message.message.chat
        chat_id = message.message.chat.id
        chat_username = message.message.chat.username
        date = time.strftime("%a, %d %b %Y %H:%M:%S +0000", time.localtime(message.message.date))
       
        text = text.strip()
        user_file = ''
        user_file += str(user.id)
        to_logs = str(date) +':Got message: from chat: {1} username:{2}'.format(text,chat_id,chat_username) + """:'{0}'""".format(text)
        print(to_logs)
        with open('log\log.txt','a') as f_obj:
            f_obj.write(to_logs + '\n')
        
        bot_message = twx.botapi.send_message(chat_id,"Привет пользователь!")
        print(bot_message)
def run(self):
        print('Main loop started')
        while True:
            updates = self.bot.get_updates(offset=self.last_update_id).wait()
            try:
                for update in updates:
                    if int(update.update_id) > int(self.last_update_id):
                        self.last_update_id = update.update_id
                        self.process_message(update,twx.botapi.User)
                      
            except Exception as ex:
                print(traceback.format_exc())
if __name__ == '__main__':
    try:
        BOT().run()
    except KeyboardInterrupt:
        print('Exiting...')     
Ошибка:
File “C:\Program Files\Python36\lib\site-packages\twx\botapi\botapi.py”, line 1933, in send_message
return TelegramBotRPCRequest('sendMessage', params=params, on_result=Message.from_result, **kwargs)
TypeError: __init__() missing 1 required positional argument: ‘token’