Your Username is your email address.
When you join U3APP, your username AND your password are set to your email address. Unless you have reset your password yourself, this will still be the case, so enter your email in both places to login.
To see what you are typing into the Password area, click on the little eye icon at the right hand end.
If you have any trouble logging in, please click here to send an email asking for help.
If clicking on the highlighted link above doesn't open an email, please send an email to email@example.com, asking to have your password reset. Please put "Password help!" in the subject line.