Missing user account in System Preferences (visible in /Users)

I am having issues with a recent issue.

Problem

I was in the middle of a Chrome session and my MacBook froze (beachball). I powered down and powered back on and was prompted with my user to log in (assuming it was the standard user). I was then taken to a second login screen where I had multiple other users but not my user. It was not showing up.

When I logged into one of the other admin users, I was taken to the desktop. I looked in my /Users folder and I was able to see my /Users/myuserfoldername with the correct files inside.

I then went to system preferences and was NOT able to see my user in the system preferences.

I ran a dscl . list /Users | grep -v '^_' command and was not able to see the real user listed.

I have already attempted to create a new user and merge it with the folder, but it did nothing. I have also tried to turn off Filevault which was also not working.

What is going on here and what can I do to fix it?