// Manager in charge of inserte a row into ExchangeRate.
public async Task <IEnumerable <ExchangeRateModel> > CreateExchangeRate(IList <ExchangeRateModel> exchangeRateModels)
{
var exchangeRateList = _mapper.Map <IList <ExchangeRateModel>, IList <ExchangeRate> >(exchangeRateModels);
IEnumerable <ExchangeRate> result = await _exchangeRateRepository.Create(exchangeRateList);
var exchangeRateModelList = _mapper.Map <IEnumerable <ExchangeRate>, IEnumerable <ExchangeRateModel> >(result);
return(exchangeRateModelList);
}