I accidentally removed the fingerprint ID option from my Mac Mini

I followed the steps given to another user that did the same thing.

Apple>System Settings>User & Groups.

However, there is no Lock to unlock. When I click on Touch ID & Password, I just get something to Add a User, Add a Group, or Edit account server.

I deleted the scan because it wasn't working; I have to log in every time. But it didn't give me an option to re-scan, and add fingerprints.