A username is your alias on the site. Your username is what other
members will see when they access your profile instead of your real
name. Username should be in a Alpha-numeric form but at least 3
characters not exceeding 15 characters. Usernames must not have spaces
or special characters such as (@--#%^&_*+). If your username is
taken try putting some numbers before or after the name (example:
123John or John123).