// POST api/Countries
        public HttpResponseMessage PostCountry(Country country)
        {
            if (ModelState.IsValid)
            {
                country.User = db.Users.Where(x => x.Id == country.UserId).SingleOrDefault();
                db.Countries.Add(country);

                try
                {
                    db.SaveChanges();
                }
                catch (Exception ex)
                {
                    return Request.CreateErrorResponse(HttpStatusCode.NotFound, ex);
                }

                HttpResponseMessage response = Request.CreateResponse(HttpStatusCode.Created);
                response.Headers.Location = new Uri(Url.Link("DefaultApi", new { id = country.ID }));
                return response;
            }
            else
            {
                return Request.CreateErrorResponse(HttpStatusCode.BadRequest, ModelState);
            }
        }
        // PUT api/Countries/5
        public HttpResponseMessage PutCountry(int id, Country country)
        {
            if (!ModelState.IsValid)
            {
                return Request.CreateErrorResponse(HttpStatusCode.BadRequest, ModelState);
            }

            if (id != country.ID)
            {
                return Request.CreateResponse(HttpStatusCode.BadRequest);
            }

            country.User = db.Users.Where(x => x.Id == country.UserId).SingleOrDefault();
            db.Entry(country).State = EntityState.Modified;

            try
            {
                db.SaveChanges();
            }
            catch (DbUpdateConcurrencyException ex)
            {
                return Request.CreateErrorResponse(HttpStatusCode.NotFound, ex);
            }

            return Request.CreateResponse(HttpStatusCode.OK);
        }