public IHttpActionResult PutStation(int id, Station station)
        {
            if (!ModelState.IsValid)
            {
                return BadRequest(ModelState);
            }

            if (id != station.ID)
            {
                return BadRequest();
            }

            db.Entry(station).State = EntityState.Modified;

            try
            {
                db.SaveChanges();
            }
            catch (DbUpdateConcurrencyException)
            {
                if (!StationExists(id))
                {
                    return NotFound();
                }
                else
                {
                    throw;
                }
            }

            return StatusCode(HttpStatusCode.NoContent);
        }
        public IHttpActionResult PostStation(Station station)
        {
            if (!ModelState.IsValid)
            {
                return BadRequest(ModelState);
            }

            //generate key and assign to a station
            String generatedKey = RandomString(32);
            station.Key = generatedKey;

            db.Stations.Add(station);
            db.SaveChanges();

            return CreatedAtRoute("DefaultApi", new { id = station.ID }, station);
        }