Get 10 next events in a shared google calendar. (calendar id @line 51)(number of events on53)

calendar.js

const fs = require('fs');
const readline = require('readline');
const {google} = require('googleapis');
const SCOPES = ['https://www.googleapis.com/auth/calendar.readonly'];
const TOKEN_PATH = 'token.json';

fs.readFile('credentials.json', (err, content) => {
    if (err) return console.log('Error loading client secret file:', err);
    authorize(JSON.parse(content), listEvents);
});

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]);

    fs.readFile(TOKEN_PATH, (err, token) => {
        if (err) return getAccessToken(oAuth2Client, callback);
        oAuth2Client.setCredentials(JSON.parse(token));
        callback(oAuth2Client);
    });
}

function getAccessToken(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);
            fs.writeFile(TOKEN_PATH, JSON.stringify(token), (err) => {
                if (err) console.error(err);
                console.log('Token stored to', TOKEN_PATH);
            });
            callback(oAuth2Client);
        });
    });
}

function listEvents(auth) {
    const calendar = google.calendar({version: 'v3', auth});
    calendar.events.list({
        calendarId: '[email protected]',
        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 {
            console.log('No upcoming events found.');
        }
    });
}