[AC Question]

I was using my galaxy s5 like I always do and it decided to freeze like it does quite often now which isn't a problem. I just let it sit for a few second and its good to go again. but this time it froze then I let it sit long enough for the screen to lock and when I turned the screen back on it says the finger print scanner stopped working and the only way I can get into my phone now is by putting in my backup password. unfortunately I forgot my backup password so now I am locked out of my phone. I have restarted it and turned it off & back on again and it still does not work. any suggestion on what to do?