Retrieves a list of user mappings in the firm associated with the authenticated client.
When request is successful. Returns an array of one or more 'FirmUser' objects.
Unique identifier of the staff member.
"750eb5c5-ac0b-7d11-4997-e0ce9d8896c8"
Unique identifier of the user.
"b471682e-fa17-4e46-b7fe-9b2b8fdcb3c2"
Returns true if this user is a former user.
false