Telegram Bot to verify if users joining a group are human. The Bot sends an image captcha for each new user and kicks any of them who can't solve the captcha in a specified time.
If user has a @username, use that in the message that says to do the captcha. In that way the new user gets a notification, knows she must do something. Now, a user can join a group just before lunch, then does not see this bot's message.
The Bot already do that if the user has an alias configured, otherwise, it will use the full name of the user.
However, #33 could makes that the notification is not fired in the user client...
If user has a @username, use that in the message that says to do the captcha. In that way the new user gets a notification, knows she must do something. Now, a user can join a group just before lunch, then does not see this bot's message.