How can I implement authentication in a Node.js application using MongoDB?

How can I implement authentication in a Node.js application using MongoDB?

You can use libraries like Passport.js for authentication. First, set up your MongoDB connection and then define your user schema.

What are the steps to set up Passport.js with MongoDB?

1. Install Passport.js and its MongoDB strategy. 2. Create a user model. 3. Configure Passport to use the local strategy. 4. Set up routes for login and registration.

How do I hash passwords before storing them in MongoDB?

You can use bcrypt to hash passwords. Install it, then use bcrypt.hash() when creating a new user.

Can you show me a code snippet for user registration?

Sure! Here's a simple example:

const bcrypt = require('bcrypt');
const User = require('./models/User');

app.post('/register', async (req, res) => {
    const hashedPassword = await bcrypt.hash(req.body.password, 10);
    const user = new User({ username: req.body.username, password: hashedPassword });
    await user.save();
    res.status(201).send('User registered');
});