index.js

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/classroom.courses.readonly', "https://www.googleapis.com/auth/classroom.coursework.me", "https://www.googleapis.com/auth/classroom.coursework.me.readonly", "https://www.googleapis.com/auth/classroom.coursework.students", "https://www.googleapis.com/auth/classroom.coursework.students.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 Google Classroom API.
    authorize(JSON.parse(content), listCourses);
});

/**
 * 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 first 10 courses the user has access to.
 *
 * @param {google.auth.OAuth2} auth An authorized OAuth2 client.
 */
function listCourses(auth) {
    const classroom = google.classroom({ version: 'v1', auth });
    classroom.courses.list({
        pageSize: 10,
    }, (err, res) => {
        if (err) return console.error('The API returned an error: ' + err);
        const courses = res.data.courses;
        if (courses && courses.length) {
            console.log('Courses:');
            courses.forEach((course) => {
                console.log(`${course.name} (${course.id})`);
                classroom.courses.courseWork.list({
                    "courseId": course.id,
                    "courseWorkStates": ["PUBLISHED"],
                    "orderBy": "dueDate desc"
                })
                    .then(function (response) {
                        const courseWork = response.data.courseWork;
                        courseWork.forEach((item) => {
                            console.log(item.title, item.dueDate, item.dueTime)


                        })
                        console.log(response.courseWork)

                    },




                        function (err) {
                            console.error(err)
                        }

                    )
            });
        } else {
            console.log('No courses found.');
        }
    });
}