public async Task GetBoard()
        {
            var res1 = await PublicApi.GetBoard(ProductCode.BtcJpy);

            Assert.NotNull(res1);

            var res2 = await PublicApi.GetBoard(ProductCode.FxBtcJpy);

            Assert.NotNull(res2);

            var res3 = await PublicApi.GetBoard(ProductCode.EthBtc);

            Assert.NotNull(res3);
        }
 public async Task TaskCanceledException()
 {
     var cancellationTokenSource = new CancellationTokenSource(TimeSpan.FromMilliseconds(50));
     await Assert.ThrowsAsync <BitFlyerApiException>(async() => await PublicApi.GetBoard(ProductCode.FxBtcJpy, cancellationTokenSource.Token));
 }