unless you have tried to change your paswword:
when ou've created your gamesas account, you've set a gamesas Nickname /Username, an email (the one that is used now as your username) and a password.
You can then connect to gamesas using: gamesas Nickname /Username + password. Or email + password: that will automatically display your gamesas Nickname.
If you've tried to change your password: email and gamesas Nickamen tie is probably broken.
You probably have to wait for a fix. I'm still waiting for an answer about this ( i've been waiting for 3 or 4 days yet ...)