What “12-digit” thing are you on about?
User IDs should be any string that a user cares to use, as long as it’s not taken. If he WANTS to use an E-Mail address, fine. But don’t force him to.
User IDs should be any string that a user cares to use, as long as it’s not taken. If he WANTS to use an E-Mail address, fine. But don’t force him to.