Why don't I have Web Sign-in option under Fingerprint Verification in Settings?

I've been watching YouTube videos on using the fingerprint verification on websites. My settings don't have the Web Sign-in option. I have an S7 Edge. I need to turn it on to use an app I have.

from Android Forums at AndroidCentral.com - Ask a Question //forums.androidcentral.com/showthread.php?t=765548&goto=newpost
via IFTTT