The username may only contain letters and numbers (A-z,0-9)

The username may only contain letters and numbers (A-z,0-9) 1.Your username can only contain letters A-Z or numbers 0-9 Username must contain only letters and numbers.No special ch Username can only contain letters,numbers and underscoress什么 The username may only consist of characters and numbers and 英语翻译Username (letters and numbers Only）*PasswordPassword (ve Your nickname can only contain letters and numbers Passwords must contain only Latin letters and numbers是什么意思 Login must contain only letters ,numbers,and underscores username contains invalid characters.it may only use a-z,0-9 username should contain alphabets,numbers什么意思 A username must with a ;etter and consist of letters