HELP-HOW DO I RESET MY PEERPLAY USER NAME

I hope someone out there knows how to reset the peerplays username for some reason I cannot get my username to work. And it's crazy because I screenshot that username and applied it. It worked one time now it's not letting me log in.

Photo:https://www.google.com/search?q=peerplay&client=ms-android-sprint-us&prmd=mvin&source=lnms&tbm=isch&sa=X&ved=0ahUKEwiQlqq4vfXUAhXGbD4KHUorDi4Q_AUICygD&biw=360&bih=560