public HttpResponseMessage GetInstructorById([FromUri] GetInstructorByIdRequest request)
        {
            var response = _service.FetchInstructorById(request);

            if (response.Instructor != null)
            {
                return(Request.CreateResponse <GetInstructorByIdResponse>(HttpStatusCode.OK, response));
            }
            else
            {
                return(Request.CreateErrorResponse(HttpStatusCode.NotFound, " Instructor Not Found"));
            }
        }