Exporting or listing every roles granted to an user


I’m looking for a way to export or list every roles that has been granted to the differents users of my scope.

Sor far, I see how to list every roles from a scope (boundary roles list -scope-id=) and see principals ID from a specific roles (boundary roles read -id=), but I haven’t exactly the results I’m looking for, which would be a listing of all roles that a specific user has been added as principals. Is there something I can do ?

I could go through every roles and seek the Principals IDs, but then again, not having the name of the user associated with the principals ID make the search a little bit harder.