The Users tab of the application is for listing the ParkReviewer users who have added their email and possibly other information prior to making data edits. This interface is mainly for reviewing who has been making data edits in the application and when those edits were made.
There are two default users in the Users table; xyxyxyxyxy and tpltpltpl. The user xyxyxyxyxy is the default for ParkReviewer users who have hit cancel rather than enter their email into the form. If the user chooses to enter their email then they should have a record in the table. The user tpltpltpl is the default for the ParkManager user. Since ParkManager users also enter their Portal authentication to use the application, their credentials are saved in the feature layers edit tracking fields.