public UsrMid AddUsr(UsrNew newUsr)
        {
            UsrMid usr = new UsrMid();

            // ...
            return(usr);
        }
        public IHttpActionResult AddUser(HttpRequestMessage requestMessage, UsrNew newUsr)
        {
            var usr    = _addUsrMaintenanceProcessor.AddUsr(newUsr);
            var result = new UsrCreatedActionResult(requestMessage, usr);

            return(result);
        }