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A full-stack authentication system involves creating both the backend (server-side) and frontend (client-side) components.

• Let’s break it down:

  1. Backend (Server-side): Database Setup: Start by setting up a database using MongoDB (you can use MongoDB Atlas for cloud-based hosting). Create a new database user with a username and password.

  2. Create Endpoints:

     • Register Endpoint: Implement an API endpoint to handle user registration. This endpoint should validate user input, hash passwords (using bcrypt), and store user data in the database.

     • Login Endpoint: Create another API endpoint for user login. Validate credentials, generate a JSON Web Token (JWT) using jsonwebtoken, and return it to the client.

     • Protect Endpoints: Secure your endpoints by verifying JWTs and ensuring only authenticated users can access protected routes.

  3. Host Backend: Deploy your backend (built with Express) on Heroku or any other hosting service.

  4. Frontend (Client-side):

     • User Interface: Build the user interface using React. Create components for registration, login, and other relevant pages.

     • Register User: Implement a registration form that sends user data (username, password) to the backend’s register endpoint.

     • Login User: Create a login form that communicates with the backend’s login endpoint. Upon successful login, store the JWT in local storage or a cookie.

     • Protect Routes: Use React Router to protect routes. Redirect unauthenticated users to the login page.

     • Make API Calls: Fetch data from the backend using useEffect hooks and make API calls to protected endpoints.

     • Logout Function: Implement a logout function to clear the JWT and redirect users to the login page.

     • Host Frontend: Deploy your React app (built with React-Bootstrap) on Netlify or another hosting service.

     • Prerequisites: Basic knowledge of Node.js, Express, and React.