Using JSON Web Tokens (JWTs) for User Authorization

Currently, our application confirms successful authentication by returning a simple message. But how do we maintain a secure authentication state for the user across various interactions with our application?
JSON Web Tokens (JWT) offer a solution, providing a secure way to authenticate users in our virtual library.

Why JWT?

JSON Web Token offers us a robust method to improve our application authentication mechanism. It enables stateless authentication, where each client’s request includes a token that our server will validate. In our signIn method, we aim to generate and return a JWT to the user upon successful authentication. Including this JWT in the headers of subsequent requests will allow our application to securely identify and validate the user’s authenticity.