Adding Fields to User records

Please be aware that I am new to Knack..

I want to define additional fields in the User Roles so that I can "roll up" users together. For example, I want to add a field called "district" to all user records in order to set fields such as "last update" to the "user" but also a sales district to the "district." The district values are stored in another database object.

I add the field to both the All User and the page underneath (Admin) and can see the "connected field" when editing the form but no values appear even though they are in both the All Users object and the Admin object.