Override Row Level Security

To add more detail, I have a dynamic RLS process going on.  I have three columns.  Team Member, Team Manager, Regional Manager. 

Every individual in the Team Table has a column with their unique user principal name in Team_Member.  FOr the Team_Manager column, every persons' team manager's user principal name is listed, and for everyone they have their Regional Manager's user principal name in the Regional_Manager Column.

The RLS function had an if statement.

IF ( countrows(FILTER(ALL(Team),Regional_Manager = userprincipalname()))>0, Regional_Manager = userprincipalname(),

IF(countrows(FILTER(ALL(Team),Team_Manager = userprincipalname()))>0,Team_Manager = userprincipalname(),

Team_Member = userprincipalname())))

This was working.  When I tested the roles a team manager had all their direct reports showing, Regional Managers had all their team managers and direct reports and so on.

I added a column to my Team table, called All, and it has the same value for every row, "[email protected]".

I thought maybe I could add a slicer that would override the individuals user principal name to see everything.

I added another table called Viewer, with one column, called Viewer with two values, All or Individual.

I put a slicer in my report where you had to pick one of those two values. 

Then in my RLS filter I created the following dynamic

var user = if(selectedvalue(Viewer[Viewer]) = "All", "[email protected]",userprincipalname())
return
if( 
  countrows(filter(all(team),all = user))>0, all = user,
if(
  countrows(filter(all(team),Regional_Manager = user))>0, Regional_Manager = user,
if(
  countrows(filter(all(team),Team_Manager = user))>0, Team_Manager = user,
  Team_Member = user)))

They dynamic filtering in RLS is working based on wether the person is a team member, manager or regional manager, but it doesn't seem to be affected at all by the slicer to override the RLS.