text: 
  
  
  const fs = require('fs');
  const readline = require('readline');
  const {google} = require('googleapis');
  
  // If modifying these scopes, delete token.json.
  const SCOPES = ['https://www.googleapis.com/auth/gmail.readonly'];
  // The file token.json stores the user's access and refresh tokens, and is
  // created automatically when the authorization flow completes for the first
  // time.
  const TOKEN_PATH = 'token.json';
  
  // Load client secrets from a local file.
  fs.readFile('credentials.json', (err, content) => {
    if (err) return console.log('Error loading client secret file:', err);
    // Authorize a client with credentials, then call the Gmail API.
    authorize(JSON.parse(content), listLabels);
  });
  
  /**
   * Create an OAuth2 client with the given credentials, and then execute the
   * given callback function.
   * @param {Object} credentials The authorization client credentials.
   * @param {function} callback The callback to call with the authorized client.
   */
  function authorize(credentials, callback) {
    const {client_secret, client_id, redirect_uris} = credentials.installed;
    const oAuth2Client = new google.auth.OAuth2(
        client_id, client_secret, redirect_uris[0]);
  
    // Check if we have previously stored a token.
    fs.readFile(TOKEN_PATH, (err, token) => {
      if (err) return getNewToken(oAuth2Client, callback);
      oAuth2Client.setCredentials(JSON.parse(token));
      callback(oAuth2Client);
    });
  }
  
  /**
   * Get and store new token after prompting for user authorization, and then
   * execute the given callback with the authorized OAuth2 client.
   * @param {google.auth.OAuth2} oAuth2Client The OAuth2 client to get token for.
   * @param {getEventsCallback} callback The callback for the authorized client.
   */
  function getNewToken(oAuth2Client, callback) {
    const authUrl = oAuth2Client.generateAuthUrl({
      access_type: 'offline',
      scope: SCOPES,
    });
    console.log('Authorize this app by visiting this url:', authUrl);
    const rl = readline.createInterface({
      input: process.stdin,
      output: process.stdout,
    });
    rl.question('Enter the code from that page here: ', (code) => {
      rl.close();
      oAuth2Client.getToken(code, (err, token) => {
        if (err) return console.error('Error retrieving access token', err);
        oAuth2Client.setCredentials(token);
        // Store the token to disk for later program executions
        fs.writeFile(TOKEN_PATH, JSON.stringify(token), (err) => {
          if (err) return console.error(err);
          console.log('Token stored to', TOKEN_PATH);
        });
        callback(oAuth2Client);
      });
    });
  }
  
  /**
   * Lists the labels in the user's account.
   *
   * @param {google.auth.OAuth2} auth An authorized OAuth2 client.
   */
  function listLabels(auth) {
    const gmail = google.gmail({version: 'v1', auth});
    gmail.users.messages.get({
      'userId': 'budi.hermawan@redawning.com',
      'id': '16d425f2566d2663'
    }, (err, res) => {
      if (err) return console.log('The API returned an error: ' + err);
      // const labels = res.data.labels;
      var gg = res.data.payload.headers
      gg.forEach( function(element, index) {
        console.log(element)
      //  if(element.name == 'Subject'){
      //   var title = element.value.replace('Fwd: ','')
      //   var title = title.replace('Partner Central Account Verification Code: ','')
      //   console.log(title)
      // }
        //console.log(index)
      });
          //console.log(res.data.payload.headers)
        });
  }
  
  function getMessage(userId, messageId, callback) {
    var request = google.gmail({version: 'v1', auth}).users.messages.get({
      'userId': userId,
      'id': messageId
    });
    request.execute(callback);
  }
  
  
    // var request = await gmail.users.messages.get({
    //   'userId': 'me',
    //   'id': '16d425f2566d266'
    // });