private void AddTransactions(TransactionJsonData[] transactions)
        {
            foreach (var transaction in transactions)
            {
                _GNBProductsContext.Add(new EfTransaction()
                {
                    Sku        = transaction.Sku,
                    Amount     = decimal.Parse(transaction.Amount),
                    CurrencyId = _GNBProductsContext.Set <Currency>().Where <Currency>(currency => currency.Name == transaction.Currency).FirstOrDefault().Id
                });
            }

            _GNBProductsContext.SaveChanges();
        }