public string RemoveCalendarPermissions(string organization, string userprincipalname, string user)
        {
            try
            {
                string[] users = new JavaScriptSerializer().Deserialize <string[]>(user);

                using (MyPowerShell ps = new MyPowerShell())
                {
                    ps.RemoveCalendarPermissions(organization, userprincipalname, users).Invoke();
                }

                return("[]");
            }
            catch (Exception exc)
            {
                return(new JsonException(exc).ToString());
            }


            //return "Org: " + organization + ", Id: " + identity + ", User: "******" & ", new JavaScriptSerializer().Deserialize<string[]>(user));
        }