Unauthorized message when start to run

[alantseat]

Dear all

I am a beginner and when i try to run the code, below error comes out. May I know if any access right i need to grant on it?

2022-01-10 12:27:02,116 - forwarder - INFO - Modules to load: ['auto_forward', 'misc']
2022-01-10 12:27:02,119 - forwarder - INFO - Successfully loaded modules: ['auto_forward', 'misc']
2022-01-10 12:27:02,120 - forwarder - INFO - Using long polling.
2022-01-10 12:27:02,120 - apscheduler.scheduler - INFO - Scheduler started
Traceback (most recent call last):
File "C:\Users\AT\PycharmProjects\Futu\Telegram\forwarder_main_.py", line 83, in
main()
File "C:\Users\AT\PycharmProjects\Futu\Telegram\forwarder_main_.py", line 76, in main
updater.start_polling(timeout=15, read_latency=4)
File "C:\Users\AT\PycharmProjects\Futu\Telegram\venv\lib\site-packages\telegram\ext\updater.py", line 422, in start_polling
self._init_thread(self.dispatcher.start, "dispatcher", ready=dispatcher_ready)
File "C:\Users\AT\PycharmProjects\Futu\Telegram\venv\lib\site-packages\telegram\ext\updater.py", line 342, in _init_thread
name=f"Bot:{self.bot.id}:{name}",
File "C:\Users\AT\PycharmProjects\Futu\Telegram\venv\lib\site-packages\telegram\bot.py", line 365, in id
return self.bot.id
File "C:\Users\AT\PycharmProjects\Futu\Telegram\venv\lib\site-packages\telegram\bot.py", line 359, in bot
self._bot = self.get_me()
File "C:\Users\AT\PycharmProjects\Futu\Telegram\venv\lib\site-packages\telegram\bot.py", line 130, in decorator
result = func(*args, **kwargs)
File "C:\Users\AT\PycharmProjects\Futu\Telegram\venv\lib\site-packages\telegram\bot.py", line 446, in get_me
result = self._post('getMe', timeout=timeout, api_kwargs=api_kwargs)
File "C:\Users\AT\PycharmProjects\Futu\Telegram\venv\lib\site-packages\telegram\bot.py", line 295, in _post
return self.request.post(
File "C:\Users\AT\PycharmProjects\Futu\Telegram\venv\lib\site-packages\telegram\utils\request.py", line 356, in post
result = self._request_wrapper(
File "C:\Users\AT\PycharmProjects\Futu\Telegram\venv\lib\site-packages\telegram\utils\request.py", line 277, in _request_wrapper
raise Unauthorized(message)
telegram.error.Unauthorized: Unauthorized