If you have forgotten your user account username, please contact your studio and ask them to look under the user tab of your profile. Your username will be displayed there. Most of the time, your username will not be your email unless you specifically set it up that way. Also, please note that usernames are case-sensitive so they must be typed exactly as they appear in the system.
If you have forgotten your password as well, click on the 'Forgot Password' link and it will email directions on how to change it.