title: Can Telegram bot detect a new member joining a channel event?
body: <p>I have a Telegram bot and I set this bot as admin of a channel. Now, when a new user ordinarily joins a channel (not a group) there is no message on the channel and no message we could get with <code>getUpdates</code> method. Is it technically possible to post a message saying “A new user has joined the channel” - and this traps the “new member” event? Let me know.</p>