public TransportApi(
     IStandardHttpClient standardHttpClient,
     TransportApiSettings transportApiSettings,
     TrainStationSettings stationSettings)
 {
     _standardHttpClient   = standardHttpClient;
     _transportApiSettings = transportApiSettings;
     _stationSettings      = stationSettings;
 }
 public HttpClientFactory(IStandardHttpClient standardHttpClient)
 {
     this.StandardHttpClient = standardHttpClient ?? throw new ArgumentNullException(nameof(standardHttpClient));
 }