How to link Top Manager to a username within "Workforce Management - Worker Assignment Real Time"

Summary:

Hi all

I'm trying to create an emergency contact report that allows managers to see their entire reporting line population and the emergency contact details on the employee records. I have been able to do this for line managers and their direct reports but not able to go down the levels beyond this. 

The way I've acheived this is to link the manager user name to user system session variable which works perfectly. 

To get the full reporting line I used the top manager name and person number which again is working great and I can see that unfiltered, it is correctly linked all reports.