I trying to find: When a user PowerApps in with my name, the system looks up the 'Full Name' to match the current user, and then displays that name in columns such as 'Assign,' 'Principal,' etc as value. That’s which will show as name in Advisor Assign on the screen from match the full name is based on user current on PowerApps.
Like that? Lookup('DHS Students Users', 'Full Name'=User().FullName, 'Advisor Assign'.Value))