"Operation not permitted." when calling the user administration API

Issue

• Getting an error similar to the following when calling the user administration API

{
  "date": 
  "msg": "Operation not permitted.",
  "perm": "cluster:read,cluster/reseller:read,cluster/reseller/customer:read,cluster/reseller/customer/domain/admin/user:read",
  "reason": "permissions",
  "status": "error"
}