Google Groups迁移C#API不起作用

我正在尝试使用C#Google Groups Migration API，但运气不佳。

我有以下代码：

public static void Main(string[] args)
{
    var body =
    @"Received: by 10.143.160.15 with HTTP; Mon, 16 Jul 2007 10:12:26 -0700 (PDT)
    Message-ID: NNNN@mail.samplegroup.com
    Date: Mon, 16 Jul 2007 10:12:26 -0700
    From: ""xxx""
    To: ""xxx""
    Subject: SUBJECT
    MIME-Version: 1.0
    Content-Type: text/plain; charset=ISO-8859-1; format=flowed
    Content-Transfer-Encoding: 7bit
    Content-Disposition: inline
    Delivered-To: xxx
    This is the body of the migrated email message.";
    var bytes = ASCIIEncoding.ASCII.GetBytes(body);
    var messageStream = new MemoryStream(bytes);
    var auth = new OAuth2LeggedAuthenticator("xxx.com", "xxx", "xxx", "xxx");
    var service = new GroupsmigrationService(auth);
    service.Key = "xxx";
    var request = service.Archive.Insert("xxx", messageStream, "message/rfc822");
    request.Upload();
}

但是这导致CCD_ 1异常。

我还尝试了以下内容：

public static class Program
{
    public static void Main(string[] args)
    {
        var body =
            @"Received: by 10.143.160.15 with HTTP; Mon, 16 Jul 2007 10:12:26 -0700 (PDT)
            Message-ID: NNNN@mail.samplegroup.com
            Date: Mon, 16 Jul 2007 10:12:26 -0700
            From: ""xxx""
            To: ""xxx""
            Subject: SUBJECT
            MIME-Version: 1.0
            Content-Type: text/plain; charset=ISO-8859-1; format=flowed
            Content-Transfer-Encoding: 7bit
            Content-Disposition: inline
            Delivered-To: xxx
            This is the body of the migrated email message.";
        var bytes = ASCIIEncoding.ASCII.GetBytes(body);
        var messageStream = new MemoryStream(bytes);
        // Register the authenticator.
        var provider = new NativeApplicationClient(GoogleAuthenticationServer.Description);
        provider.ClientIdentifier = "xxx";
        provider.ClientSecret = "xxx";
        var auth = new OAuth2Authenticator<NativeApplicationClient>(provider, GetAuthorization);
        // Create the service.
        var service = new GroupsmigrationService(auth);
        service.Key = "xxx";
        var request = service.Archive.Insert("xxx", messageStream, "message/rfc822");
        request.Upload();
        Console.ReadKey();
    }
    private static IAuthorizationState GetAuthorization(NativeApplicationClient arg)
    {
        // Get the auth URL:
        // IAuthorizationState state = new AuthorizationState(new[] { TasksService.Scopes.Tasks.GetStringValue() });
        IAuthorizationState state = new AuthorizationState(new[] { "https://www.googleapis.com/auth/apps.groups.migration" });
        state.Callback = new Uri(NativeApplicationClient.OutOfBandCallbackUrl);
        Uri authUri = arg.RequestUserAuthorization(state);
        // Request authorization from the user (by opening a browser window):
        Process.Start(authUri.ToString());
        Console.Write("  Authorization Code: ");
        string authCode = Console.ReadLine();
        Console.WriteLine();
        // Retrieve the access token by using the authorization code:
        return arg.ProcessUserAuthorization(authCode, state);
    }
}

但以CCD_ 2失败。内部异常是：

远程服务器返回错误：（503）服务器不可用。

理想情况下，我更喜欢使用2脚身份验证器方法，因为它在复制和粘贴身份验证密钥时不需要手动干预，但现在让任何东西都能工作将是一个优势。

感谢您的帮助！