A unique username means a name that is different from all others. It is a special and individual username that no one else has chosen or used before. Full definition
Click here to register your own unique username and become part of the ever - growing community! (gtalibertycitystories.net)
People use it because it's easy — usually one or two taps — and eliminates the need for people to remember a bunch of unique username and password combinations. (recode.net)
Bunker Labs requires unique usernames and passwords that must be entered each time a user logs on to Bunker Labs» client interface. (bunkerlabs.org)