How do I implement JWT in my application?

How do I implement JWT in my application?

To implement JWT, you first need to choose a library for your programming language. Do you have a specific language in mind?

I'm using Node.js. What library should I use?

For Node.js, a popular choice is 'jsonwebtoken'. You can install it using npm. Would you like a code example?

Yes, please provide a code example for generating a JWT.

Here's a simple example:

const jwt = require('jsonwebtoken');
const token = jwt.sign({ userId: 123 }, 'your_secret_key', { expiresIn: '1h' });
console.log(token);

This generates a token with a payload containing userId.

How do I verify the JWT once it's generated?

You can verify a JWT using the same library. Use jwt.verify(token, 'your_secret_key') to check its validity.