public async Task Should_GetScannerDataAsync_String()
        {
            // Arrange
            var subscription = new ScannerSubscription()
            {
                ScanCode     = "MOST_ACTIVE",
                Instrument   = "STK",
                LocationCode = "STK.US"
            };

            // Act
            var scanners = await _client.GetScannerDataAsync(subscription, "", "");

            // Assert
            var symbols = scanners.Select(x => x.ContractDetails.Contract.Symbol);

            Assert.Positive(symbols.Count());
        }