INCOMPLETE. WIP
Just /start the bot. If anyone in a chat where the bot is also a member /cc some users to/in a message, they will get notifications about it. To be more specific, they'll get a carbon-copy of the message. Mentioned users doesn't need to be in the group - that's a goal.
@pinging is enough, of course. But it doesn't work for the users that are not in the group.
Example message:
Seems like a possible fix for the issue.
/cc @user1 text_mention_of_user2.
(Or you can /cc as a reply message.)
NOTE: CCs are only send to the mentioned ones in the same line as the /cc command.
BOT_TOKEN: Get one from https://t.me/BotFather.