Get the list of users assigned to an App

Need help on getting the list of users assigned to an app.

I have tried using the servicePrincipals queries. But, it is only retruning the AppRoles. I need to know the users assigned in the role.

https://graph.microsoft.com/beta/servicePrincipals/c6726d92-0c7b-40eb-863d-db887d958c08/appRoleAssignedTo

I can see the approles using the users queries. So, there must be some way to get the details other way.

https://graph.microsoft.com/beta/users/uid/appRoleAssignments?$filter=resourceId eq 171f3837-b87b-4fc7-b680-4357fd3ec3d2