问使用Google.GoogleApiException时“Google.Apis.Requests.RequestError请求缺少必需的身份验证证书”

EN

Scopes = new string[] { ScriptService.Scope.Forms, ScriptService.Scope.Spreadsheets,
            ScriptService.Scope.Drive, YouTubeService.Scope.YoutubeUpload, YouTubeService.Scope.Youtube };

UserCredential credential;
using (var stream = new FileStream(@"Resources\client_secret.json", FileMode.Open, FileAccess.Read))
{
    var credPath = Path.Combine(parentDir, ".credentials/" + folderName);

    credential = GoogleWebAuthorizationBroker.AuthorizeAsync(
         GoogleClientSecrets.Load(stream).Secrets,
         Scopes,
         "user",
         CancellationToken.None,
         new FileDataStore(credPath, true)).Result;
}

// Create Google Apps Script Execution API service.
var service = new ScriptService(new BaseClientService.Initializer()
{
    HttpClientInitializer = this.credential,
    ApplicationName = Properties.Resources.ApplicationName,
 });

// Create an execution request object.
ExecutionRequest request = new ExecutionRequest();
request.Function = "createForm";
request.Parameters = new List<object>();
request.Parameters.Add(this.id);
request.Parameters.Add(name);
request.Parameters.Add(email);
request.Parameters.Add(this.link);

ScriptsResource.RunRequest runReq = service.Scripts.Run(request, Globals.Script_ID);

try
{
    // Make the API request.
    Operation op = runReq.Execute();
catch (Google.GoogleApiException e)
{
    Debug.WriteLine("Error calling API:\n{0}", e.ToString());
}