public HttpResponseMessage PostAirport([FromBody] AIRPORT airport)
        {
            try
            {
                using (TECAirlinesDBEntities entities = new TECAirlinesDBEntities())
                {
                    entities.INSERT_AIRPORT(airport.AIRPORT_NAME, airport.IATA_CODE, airport.STATE_CODE,
                                            airport.COUNTRY_CODE, airport.COUNTRY_NAME);
                    entities.SaveChanges();

                    var message = Request.CreateResponse(HttpStatusCode.Created, airport);
                    message.Headers.Location = new Uri(Request.RequestUri + airport.IATA_CODE);
                    return(message);
                }
            }
            catch (Exception ex)
            {
                return(Request.CreateErrorResponse(HttpStatusCode.BadRequest, ex));
            }
        }