You don't. Unfortunately if you set up a secure lockscreen and the credentials to access the phone are not provided, the phone stays securely locked. The only way to get it 'working' again is to do a factory reset, which deletes all data in the phone (the purpose of protecting it with a secure password).
You can reset your lockscreen password using Google's Device Manager through the Play Store, but if your phone is also not accepting your Google account credentials, maybe it has a different account loaded in or your password is not being entered correctly.
03-25-2015 12:52 PM