🔐 AuthDemo – Spring Boot + MySQL + JWT Authentication

A simple and secure backend system for user registration and login, built as part of a backend internship challenge.

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📌 Features

• User Registration with Full Name, Email, and Password
• Secure Login with password hashing (BCrypt)
• JWT-based Authentication
• Stateless security using Spring Security
• MySQL Database integration
• Input validation and error handling

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🧰 Tech Stack

• Language: Java 21
• Framework: Spring Boot
• Security: Spring Security + JWT (jjwt)
• Database: MySQL
• ORM: Spring Data JPA + Hibernate
• Build Tool: Maven
• API Testing: Postman

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🛠️ Setup Instructions

✅ Prerequisites

• Java 21+
• Maven
• MySQL
• IDE (e.g. IntelliJ)
• Postman (for testing)

🧑‍💻 Steps

1. Clone the repository

   git clone https://github.com/KrishNatrium/AuthDemo.git
   cd authdemo
   

2. Create MySQL Database

   CREATE DATABASE authdb;

3. Update application.properties

   spring.datasource.username=your_mysql_user
   spring.datasource.password=your_mysql_password
   

4. Run the Application

   • Open in IntelliJ
   • Run DemoApplication.java
   • App runs at: http://localhost:9090

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📬 API Endpoints

🔸 Register

POST /api/auth/register

Request Body:

{
  "fullName": "Krishna Gopal Kar",
  "email": "krishna@example.com",
  "password": "password123"
}

Returns: JWT token

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🔸 Login

POST /api/auth/login

Request Body:

{
  "email": "krishna@example.com",
  "password": "password123"
}

Returns: JWT token

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🧪 Sample Test Credentials

You can register any credentials, but here's one:

Email	Password
krishna@example.com	password123

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✅ Optional Enhancements

• Protected routes (e.g. /api/user/me)
• Docker Support
• Role-based authorization

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👤 Author

Krishna Gopal Kar B.Tech CSE | KIIT DU LinkedIn GitHub

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