View Existing Assigned Permissions to SP AddIns
Once permissions are applied to a Service Principal name via _layouts/15/appinv.aspx, it is not possible to see the permissions applied there after. Please build some functionality via the GUI so we can see each (XML) permission applied per Client ID and at what scope it was defined. These service principal names do not appear as 'SharePoint Apps' in the site contents page like other AddIns do, hence we can't click permissions and view them.
