You have to enter the current password (in settings) to then get it to allow you to chose another option (different password, a PIN, no password, etc.), so if you don't know the password, there is nothing you can do.
We cannot assist in bypassing any log in requirements. So if that is the case here, please read the following thread...http
/www.tomsguide.com/forum/id-2317976/read-passwords-lock-codes-pin-numbers.html