//URL POST :   http://localhost:50538/RestService/RestService.svc/RegisterDevice
 public Response RegisterDevice(DeviceInfoContract deviceInfo)
 {
     var user = _userService.GetBy(deviceInfo.UserLogin);
     if (user != null)
     {
         var newDevice = new Device
         {
             RegistrationId = deviceInfo.RegistrationId,
             Imei = deviceInfo.Imei,
             User = user
         };
         _deviceService.Create(newDevice);
         return new SuccessResponse();
     }
     else
     {
         return new FailureResponse();
     }
 }
        //URL POST :   http://localhost:50538/RestService/RestService.svc/RegisterDevice
        public Response RegisterDevice(DeviceInfoContract deviceInfo)
        {
            var user = _userService.GetBy(deviceInfo.UserLogin);

            if (user != null)
            {
                var newDevice = new Device
                {
                    RegistrationId = deviceInfo.RegistrationId,
                    Imei           = deviceInfo.Imei,
                    User           = user
                };
                _deviceService.Create(newDevice);
                return(new SuccessResponse());
            }
            else
            {
                return(new FailureResponse());
            }
        }