public HistoricalExchangeRateController(IHistoricalExchangeRateService historicalExchangeRateService)
 {
     _historicalExchangeRateService = historicalExchangeRateService ?? throw new ArgumentNullException(nameof(historicalExchangeRateService));
 }
 public HistoricalExchangeRateController(IHistoricalExchangeRateService historicalExchangeRateService)
 {
     this._historicalExchangeRateService = historicalExchangeRateService;
 }