This project demonstrates a simple authentication and authorization system using Node.js, Express, MongoDB, and JWT. It includes user registration, login, and access to protected routes with secure JWT-based authentication.

• User Registration: Allows new users to register with a username, email, and password.
• User Login: Authenticates users and provides a JWT for accessing protected routes.
• Protected Routes: Secured endpoints that can only be accessed with a valid JWT.

• Node.js: JavaScript runtime built on Chrome's V8 JavaScript engine.
• Express: Fast, unopinionated, minimalist web framework for Node.js.
• MongoDB: NoSQL database for storing user data.
• JWT (JSON Web Token): For securely transmitting information between parties as a JSON object.