If you still have access to the email that you used to register with, your best option would be to email our archive mod at tos_team@adult-fanfiction.org from that email, and she’ll send you a link to reactivate your account and reset your password.
If you have lost access to that email account, you can send our archive mods at the same address, from a new email account, telling her what the old email associated to your user profile with us was, and she’ll be able to update your email (I’m almost certain I’m not remembering that incorrectly ) and then send you activation and reset links.