public async Task <IHttpActionResult> GetUnapprovedBookingByUserId(string id)
        {
            var listOfBookings = await bookingServices.GetListOfUnapprovedBookingsByUserId(id);

            if (listOfBookings == null)
            {
                return(ResponseMessage(Request.CreateResponse(HttpStatusCode.BadRequest, "There is no booking associated with that application user ID.")));
            }
            return(Ok(listOfBookings));
        }