public async Task <IActionResult> GetExchanges([FromRoute] string source) { if (source.Equals("all")) { IEnumerable <ExchangeRates> exchangeRates = await _exchangeRateService.GetExchangeRateFromAllSources(); return(Ok(_mapper.Map <IEnumerable <ExchangeRatesViewModel> >(exchangeRates))); } return(NotFound()); }