public async Task <IHttpActionResult> GetLast()
        {
            IList <TransactionResponse> mappedTransactions = null;
            await Task.Run(async() =>
            {
                var latestTransactions = await _dbExecutor.GetLatestTransactions();
                var requestedIds       = Finder.RequestedFinder(latestTransactions);
                await _dbExecutor.UpdateRequestedTransactions(requestedIds);
                mappedTransactions = Mapper.Map <IList <Transaction>, IList <TransactionResponse> >(latestTransactions);
            });

            return(Ok(mappedTransactions));
        }