How to unlock a password
How to unlock your password
Question marked as
If you're talking about your Apple ID Password:--> If you forgot your Apple ID password - Apple Support
If you're talking about your iphone's passcode (to unlock screen / access):--> If you forgot the passcode for your iPhone, iPad, or iPod touch, or your device is disabled - Apple Support
If you meant something different, please better explain your needs.
Regards
Giulio