如何取消谷歌云StorageClient UploadObjectAsync？

using Google.Cloud.Storage.V1;
using System.Threading;
using System.Threading.Tasks;

public class StorageClientExample
{
    public async Task CancelUploadObjectAsync()
    {
        // 创建一个CancellationTokenSource对象
        var cancellationTokenSource = new CancellationTokenSource();

        // 调用CancellationTokenSource的Cancel方法来取消操作
        cancellationTokenSource.Cancel();

        // 创建StorageClient对象
        var storageClient = StorageClient.Create();

        // 调用UploadObjectAsync方法并传递CancellationToken
        await storageClient.UploadObjectAsync(
            bucket: "your-bucket-name",
            objectName: "your-object-name",
            contentType: "text/plain",
            source: "your-file-path",
            cancellationToken: cancellationTokenSource.Token);
    }
}