can't access my gmail inbox using chatbot

Question

I created an intent to access newest emails comes in inbox and it was working ok.

After i change my password of my gmail account i cannot access my gmail using bot. Previously i was able to access email in my chatbot without authorization, and was working very good. I try to create new OAuth 2.0 client IDs json file but still doesn't work.

Here is the code :

 string jsonPath2 = 
 System.Web.Hosting.HostingEnvironment.ApplicationPhysicalPath + 
    "client_secret_p1.json";

  UserCredential credential;
   string[] Scopes = { GmailService.Scope.GmailReadonly };
   string credPath = System.Environment.GetFolderPath(
       System.Environment.SpecialFolder.Personal);
   using (var stream = new FileStream(jsonPath2, FileMode.Open, 
      FileAccess.Read))
   {
   credential = await GoogleWebAuthorizationBroker.AuthorizeAsync(
                GoogleClientSecrets.Load(stream).Secrets,
   // This OAuth 2.0 access scope allows for read-only access 
       to the authenticated 
   // user's account, but not other types of account access.
                new[] { GmailService.Scope.GmailReadonly, GmailService.Scope.MailGoogleCom, GmailService.Scope.GmailModify, GmailService.Scope.GmailMetadata },
                "xxxx@gmail.com",
                CancellationToken.None,
                new FileDataStore(this.GetType().ToString())
            );
        }
    var gmailService = new GmailService(new BaseClientService.Initializer()
        {
    HttpClientInitializer = credential,
     ApplicationName = this.GetType().ToString()
        });

     var emailListRequest = gmailService.Users.Messages.List("xxxx@gmail.com");
     emailListRequest.LabelIds = "INBOX";
     emailListRequest.MaxResults = 1;
     emailListRequest.Q = "is:unread";
     emailListRequest.IncludeSpamTrash = false;

   //emailListRequest.Q = "is:unread"; // This was added because I only wanted unread emails...
  // Get our emails
  var emailListResponse =  emailListRequest.Execute();
 //get our emails 
  log.Info(" emailListResponse is " + emailListResponse);
  if (emailListResponse != null && emailListResponse.Messages != null)
    {
  //loop through each email and get what fields you want... 
    foreach (var email in emailListResponse.Messages)
    {
    var emailInfoRequest = gmailService.Users.Messages.Get("xxx@gmail.com", email.Id);
    var emailInfoResponse = emailInfoRequest.Execute();
    if (emailInfoResponse != null)
      {
     String from = "";
     String date = "";
     String subject = "";
     String body = "";
    //loop through the headers to get from,date,subject, body  
                    foreach (var mParts in emailInfoResponse.Payload.Headers)
     {
     if (mParts.Name == "Date")
     {
     date = mParts.Value;
     }
     else if (mParts.Name == "From")
     {
     from = mParts.Value;
     }
     else if (mParts.Name == "Subject")
     {
     subject = mParts.Value;
     }
     if (date != "" && from != "")
     {
     foreach (MessagePart p in emailInfoResponse.Payload.Parts)
     {                
      if (emailInfoResponse.Payload.Parts == null && emailInfoResponse.Payload.Body != null)
     body = DecodeBase64String(emailInfoResponse.Payload.Parts[0].Body.Data);
     else
     body = GetNestedBodyParts(emailInfoResponse.Payload.Parts, "");
     }
     //else  
     if (p.MimeType == "text/html")
     //{
     //byte[] data = FromBase64ForUrlString(p.Body.Data);
      //    string decodedString = Encoding.UTF8.GetString(data);
      //}
      }    
      }
      ///////////
      var source = body;
      var parser = new HtmlParser();
      var dom = parser.Parse(source);
      var querySelector = dom.QuerySelector("a");
      //var textLink = querySelector.GetAttribute("href");            
      await context.PostAsync("Info: Date );

client secret format:

{"installed":{"client_id":"com","project_id":"","auth_uri":"https://accounts.google.com/o/oauth2/auth","token_uri":"https://www.googleapis.com/oauth2/v3/token","auth_provider_x509_cert_url":"https://www.googleapis.com/oauth2/v1/certs","client_secret":"","redirect_uris":["urn:ietf:wg:oauth:2.0:oob","http://localhost"]}}

I revoke access to this app. I try to read data from gmail, the bot ask me to login , i put the credential of my account nad i receive this windows :

中获取img文本

之后，我无法访问数据：（