No permission to access this resource. This most likely reflects a limitation on the identity of the Control Panel user corresponding to the API client. See Get started to make sure you have permission to access all the functionality you need.
This sample 403 error shows a typical permissions error:
{
"instance": "",
"httpStatus": 403,
"detail": "",
"title": "Admin does not have admin access to all groups that user has access to",
"type": "/useradmin-api/error-types/1130"
}