🔐 UserAuthService

A full-stack User Authentication Service built using Spring Boot for the backend and React for the frontend. This project provides secure user registration, login, and role-based access control using JWT authentication, making it suitable for modern and scalable web applications.

✨ Features

• User Registration & Login
• JWT-based Authentication & Authorization
• Role-Based Access Control (RBAC)
• Secure Password Encryption (Spring Security)
• RESTful APIs
• React-based Frontend Integration
• CORS Configuration for Frontend–Backend Communication

🛠️ Tech Stack

• Backend

• Java
• Spring Boot
• Spring Security
• JWT (JSON Web Tokens)
• JPA / Hibernate
• MySQL

• Frontend

• React
• JavaScript
• Html
• Css
• React Router

📂 Project Structure UserAuthService/ │── backend/ │ ├── controller/ │ ├── service/ │ ├── repository/ │ ├── model/ │ ├── security/ │ └── application.properties │ │── frontend/ │ ├── src/ │ ├── components/ │ ├── pages/ │ └── services/

⚙️ Backend Configuration (application.properties)

Before running the application, you must configure the following properties in application.properties.

1️⃣ Server Configuration server.port=8080 ( Change the port if required )

2️⃣ Database Configuration spring.datasource.url=jdbc:mysql://localhost:3306/userauthdb spring.datasource.username=YOUR_DB_USERNAME spring.datasource.password=YOUR_DB_PASSWORD

Create a MySQL database named userauthdb Replace username and password with your MySQL credentials

3️⃣ JPA / Hibernate Configuration spring.jpa.hibernate.ddl-auto=update spring.jpa.show-sql=true spring.jpa.properties.hibernate.dialect=org.hibernate.dialect.MySQLDialect

update automatically updates database tables show-sql prints SQL queries in the console

4️⃣ JWT Configuration jwt.secret=your_jwt_secret_key jwt.expiration=86400000

jwt.secret: Use a strong secret key jwt.expiration: Token validity in milliseconds (24 hours here)

5️⃣ CORS Configuration (if applicable) frontend.url=http://localhost:3000 ( Ensure this matches your React frontend URL )

▶️ Running the Backend (Spring Boot)

Navigate to backend folder

cd Server

Run the application

mvn spring-boot:run

Backend will start at: http://localhost:8080

▶️ Running the Frontend (React)

Navigate to frontend folder

cd client

Install dependencies

npm install

Start the React app

npm start

Frontend will run at: http://localhost:3000

🔑 API Endpoints Method Endpoint Description POST /api/auth/register Register new user POST /api/auth/login User login & JWT generation GET /api/user/profile Get logged-in user details

🔒 Authentication Flow

• User registers or logs in via React UI
• Backend validates credentials
• JWT token is generated and returned
• Token is stored on the frontend
• Protected APIs require JWT in Authorization header

Authorization: Bearer <JWT_TOKEN>

🚀 Future Improvements

Refresh Token Support OAuth2 (Google/GitHub Login) Docker Support

🤝 Contributing Contributions are welcome! Feel free to fork this repository and submit a pull request.

⭐ If you like this project, consider giving it a star on GitHub!