invalid literal for int() with base 10: 'STunionn\\n'

[ljhOfGithub]

Traceback (most recent call last):
  File "joinGroup_final.py", line 33, in join_group_by_id
    channel = await client.get_entity(PeerChannel(int('{channel_id}'.format(channel_id=channel_id))))
ValueError: invalid literal for int() with base 10: 'STunionn\n'
加群失败 ("invalid literal for int() with base 10: 'STunionn\\n'",)
总共成功数量： 0

hello,when I use your example of 't.me/STunionn' in the txt file,I get the error.How can I fix it?
I use await client(ImportChatInviteRequest(hash='hlQ3QhNi6q05ZDIx')) instead, but it can't work.