Why isnt my finger scanner nor alternative password working?

[AC Question]

My finger scanner wasnt working so I attempted to use my alternative password. Apparently it's incorrect yet 30 minutes ago the code worked. How can I get my phone functioning again?

 

[Almeuit]

Hello!
I would try logging into your Google Account on a PC and then go to Android Device Manager (https://www.google.com/android/devicemanager). From there you can setup a new password and GPS/Locate your device.
Also you can try entering your main PW wrong a few times and the phone usually will prompt for your Google Account to unlock the device if you would rather do than (or don't have access to ADM).