yvki

// 1. create a backend file with middleware function to check if user is logged in within 3 steps, note that the following snippet is a sample function asserting that a given token not only follows a proper JWT format, but also it's signature matches during the encoding and decoding process, so as to grant actions entitled to a privileged user 

// 1.1 import modules
const jwt = require("jsonwebtoken");
const JWT_SECRET = process.env.JWT_SECRET;
// 1.2 declare token verification function  
function verifyToken(req, res, next) {
    const authHeader = req.headers.authorization;
    // 1.2.1 check if the header contains the authorization information
    if (authHeader === null || authHeader === undefined || !authHeader.startsWith("Bearer ")) {

yvki

//create a class to modal MCQ which takes in question, choice, answer and category as its parameter
class MCQ {
    constructor(question, choice, answer, category) {
        this.question = question;
        this.choice = choice;
        this.answer = answer;
        this.category = category;
        this.userAnswer = "";
    }
    //write a method to display question and choices format