Board Thread:Questions and Answers/@comment-34737763-20180218143252/@comment-26447088-20180218201459

I hope you registered your account, because that's the only way that you can recover your account. I've tried before, and they do not let you log back into your account without the code sent to your email when you registered.

If you did register, good news. All you have to do is tap on "Change Account" at the start screen and enter your password.