If you've forgotten your username or password (or both), you can retrieve them. If you've forgotten both your username and password, retrieve your username first, then your password. You'll need to access the email address associated with your Control Center user profile. (For Control Center profiles created after July 6, 2023, your username is your email address.)
If you've forgotten your password and have tried to sign in several times, your user profile may be locked. If your user profile is locked, you can still retrieve your password, but you must wait 30 minutes for your user profile to be unlocked before trying to sign in again.