Traceback (most recent call last):
  File "2.py", line 18, in <module>
    channel_cli = client.get_entity(1163621939)
  File "/python/vi/lib/python3.5/site-packages/telethon/sync.py", line 39, in syncified
    return loop.run_until_complete(coro)
  File "/usr/lib/python3.5/asyncio/base_events.py", line 466, in run_until_complete
    return future.result()
  File "/usr/lib/python3.5/asyncio/futures.py", line 293, in result
    raise self._exception
  File "/usr/lib/python3.5/asyncio/tasks.py", line 239, in _step
    result = coro.send(None)
  File "/python/vi/lib/python3.5/site-packages/telethon/client/users.py", line 250, in get_entity
    inputs.append(await self.get_input_entity(x))
  File "/python/vi/lib/python3.5/site-packages/telethon/client/users.py", line 420, in get_input_entity
    .format(peer)
ValueError: Could not find the input entity for <telethon.tl.types.PeerUser object at 0x7f53524b4b00>. Please read https://docs.telethon.dev/en/latest/concepts/entities.html to find out more details.

cursor = db.cursor(pymysql.cursors.DictCursor)

api_id = 5

api_hash = 'a00b15b88855'

client = TelegramClient('89', api_id, api_hash).start()

channel_cli = client.get_entity(1163621939)

print (channel_cli)

client.get_messages(source_channel, ids=message_id)