Simple Node.js User Authentication in 12 Minutes!
If you’re looking to add user authentication to your Node.js application, you’re in luck! In this article, we’ll walk you through the process of setting up a simple user authentication system in just 12 minutes. Let’s get started!
Step 1: Install Required Packages
First, you’ll need to install the necessary packages for user authentication. Open your terminal and run the following commands:
npm install express bcrypt body-parser jsonwebtoken mongoose
Step 2: Set Up Your Express Server
Next, create a new file called server.js and set up your Express server:
const express = require('express');
const bodyParser = require('body-parser');
const app = express();
app.use(bodyParser.json());
app.listen(3000, () => {
console.log('Server running on port 3000');
});
Step 3: Set Up Your User Model
Create a new file called User.js and define your User model:
const mongoose = require('mongoose');
const userSchema = new mongoose.Schema({
username: String,
password: String
});
const User = mongoose.model('User', userSchema);
module.exports = User;
Step 4: Implement User Authentication
Now, let’s implement user authentication in your server.js file:
app.post('/login', (req, res) => {
const { username, password } = req.body;
User.findOne({ username }, (err, user) => {
if (err) {
res.status(500).send('An error occurred');
} else if (!user) {
res.status(401).send('Invalid username');
} else {
bcrypt.compare(password, user.password, (err, result) => {
if (result) {
res.status(200).send('Login successful');
} else {
res.status(401).send('Invalid password');
}
});
}
});
});
Step 5: Start Your Server
Finally, start your server by running the following command in your terminal:
node server.js
That’s it! You now have a simple user authentication system set up in your Node.js application. You can now create new users, log in existing users, and handle authentication in just 12 minutes. Happy coding!
why still using "var" ?