Google日历中未显示事件列表

Question

我正在编写代码以使用Node.js访问Google日历中的事件列表，但执行后无法显示事件。我什至没有任何错误。遵循google docs中给出的步骤。在出现错误的地方帮我。

我是否必须将calendar-nodejs-quickstart.json保留在同一文件夹中。

    let fs = require('fs');
    let readline = require('readline');
    let google = require('googleapis');
    let googleAuth = require('google-auth-library');

    // If modifying these scopes, delete your previously saved credentials
    // at ~/.credentials/calendar-nodejs-quickstart.json
    let SCOPES = [
        'https://www.googleapis.com/auth/calendar',
        'https://www.googleapis.com/auth/plus.me'
    ];

    let TOKEN_DIR = (process.env.HOME || process.env.HOMEPATH || process.env.USERPROFILE) + '/.credentials/';
    let TOKEN_PATH = TOKEN_DIR + 'calendar-nodejs-quickstart.json';



    /**
     * 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.
     */
    let authorize = function(credentials, callback, res) {
        let clientSecret = credentials.installed.client_secret;
        let clientId = credentials.installed.client_id;
        let redirectUrl = credentials.installed.redirect_uris[0];
        let auth = new googleAuth();
        let oauth2Client = new auth.OAuth2(clientId, clientSecret, redirectUrl);

        console.log("TOKEN_PATH: " + TOKEN_PATH);

        // Check if we have previously stored a token.
        fs.readFile(TOKEN_PATH, function (err, token) {
            if (err) {
                getNewToken(oauth2Client, callback, res);
            } else {
                oauth2Client.credentials = JSON.parse(token);
                callback(oauth2Client, res);
            }
        });
    };

    /**
     * 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 to call with the authorized
     *     client.
     */
    let getNewToken = function(oauth2Client, callback, res) {
        let authUrl = oauth2Client.generateAuthUrl({
            access_type: 'offline',
            scope: SCOPES
        });

        console.log('Authorize this app by visiting this url: ', authUrl);

        let rl = readline.createInterface({
            input: process.stdin,
            output: process.stdout
        });

        rl.question('Enter the code from that page here: ', function(code) {
            rl.close();

            oauth2Client.getToken(code, function(err, token) {
                if (err) {
                    console.log('Error while trying to retrieve access token', err);
                    return;
                }

                oauth2Client.credentials = token;
                storeToken(token);
                callback(oauth2Client, res);
            });
        });
    };

    /**
     * Store token to disk be used in later program executions.
     *
     * @param {Object} token The token to store to disk.
     */
    let storeToken = function(token) {
        try {
            fs.mkdirSync(TOKEN_DIR);
        } catch (err) {
            if (err.code != 'EEXIST') {
                throw err;
            }
        }

        fs.writeFile(TOKEN_PATH, JSON.stringify(token));
        console.log('Token stored to ' + TOKEN_PATH);
    };
function listEvents(auth) {
  const calendar = google.calendar({version: 'v3', auth});
  calendar.events.list({
    calendarId: 'primary',
    timeMin: (new Date()).toISOString(),
    maxResults: 10,
    singleEvents: true,
    orderBy: 'startTime',
  }, (err, res) => {
    if (err) return console.log('The API returned an error: ' + err);
    const events = res.data.items;
    if (events.length) {
      console.log('Upcoming 10 events:');
      events.map((event, i) => {
        const start = event.start.dateTime || event.start.date;
        console.log(`${start} - ${event.summary}`);
      });
    } else {`enter code here`
      console.log('No upcoming events found.');
    }
  });