How do I reset my Bethesda account?
How To Unlink Xbox Live, PlayStation Network, And Steam Accounts From Bethesda.net Account 2020
If you have forgotten your Bethesda.net sign in details, you can have your username sent to you or password reset by clicking "Forgot Username?" or "Forgot Password" from the sign in menu here. To receive your username, you will be asked to provide your account email address.