public async Task Execute(DestinationInput input)
        {
            if (input == null)
            {
                _outputHandler.Error("Input is null.");
                return;
            }

            var destinations = input.Destinations.Select(d =>
                                                         new Destination()
            {
                AirlineId = d.AirlineId,
                Country   = d.Country
            }).ToList();

            await _destinationRepository.Add(destinations);

            var airlineOutput = new DestinationOutput(destinations);

            _outputHandler.Standard(airlineOutput);
        }
 public void Standard(DestinationOutput output)
 {
     ViewModel = new JsonResult(output.Destinations);
 }