How can I implement authentication in my Express app using middleware?

How can I implement authentication in my Express app using middleware?

You can use middleware like Passport.js for authentication in your Express app. Would you like a code example?

Yes, please provide a code example for using Passport.js.

Sure! First, install Passport and the necessary strategies. Then, set it up in your Express app like this:

const passport = require('passport');
const LocalStrategy = require('passport-local').Strategy;

passport.use(new LocalStrategy((username, password, done) => {
    // Verify username and password
}));

app.use(passport.initialize());
app.use(passport.session());

What about session management? How do I handle user sessions?

You can use express-session to manage user sessions. Here's how to set it up:

const session = require('express-session');

app.use(session({
    secret: 'your-secret-key',
    resave: false,
    saveUninitialized: true
}));