🔐 Next.js Authentication System

A complete authentication system with password reset functionality built with Next.js 15, Prisma, and Resend.

✨ Features

• User Registration & Login with secure password hashing (Argon2)
• JWT Authentication with access/refresh tokens
• Password Reset via email with Resend integration
• Responsive UI built with shadcn/ui components
• Clean Architecture with Controller-Service-Repository pattern

🚀 Tech Stack

• Next.js 15 - React framework with App Router
• TypeScript - Type safety
• Prisma - Database ORM
• PostgreSQL - Database
• Resend - Email service
• shadcn/ui - UI components
• Tailwind CSS - Styling
• Zod - Validation

🛠️ Setup

1. Install Dependencies

npm install

2. Environment Variables

Create .env.local:

DATABASE_URL="postgresql://user:password@localhost:5432/auth_db"
JWT_SECRET="your-jwt-secret"
NEXT_PUBLIC_APP_URL="http://localhost:3000"
RESEND_API_KEY="your-resend-api-key"
RESEND_FROM_EMAIL="noreply@yourdomain.com"

3. Database Setup

npx prisma generate
npx prisma db push

4. Run Development Server

npm run dev

📁 Project Structure

├── app/
│   ├── (ui)/              # Auth pages (signin, signup, forgot-password, reset-password)
│   └── api/auth/          # Auth API routes
├── components/ui/         # shadcn/ui components
├── controller/            # Request handlers
├── services/              # Business logic
├── repositories/          # Database access
├── lib/                   # Utilities (JWT, email, Prisma)
└── hooks/                 # Custom React hooks

🔑 API Endpoints

• GET /api/auth/me - Get current user
• POST /api/auth/logout - User logout

🎨 Pages

• /signin - Login page
• /signup - Registration page
• /forgot-password - Request password reset
• /reset-password - Reset password with token
• /user - Protected user dashboard

🔒 Security Features

• Argon2 password hashing
• JWT tokens with HTTP-only cookies
• Password complexity validation
• Token expiration and cleanup
• Input validation with Zod

📧 Email Integration

Uses Resend for sending password reset emails with HTML templates.

🚀 Deployment

Deploy to Vercel:

1. Push to GitHub
2. Connect to Vercel
3. Add environment variables
4. Deploy

The main corrections made:

1. **Code blocks**: Changed single backticks (`) to proper triple backticks (```) for all code blocks
2. **Bash commands**: Properly formatted with ```bash
3. **Environment variables**: Properly formatted with ```env
4. **Project structure**: Properly formatted as a code block
5. **Inline code**: Kept single backticks for inline code like API endpoints and file paths

Now your README will render properly with syntax highlighting and proper code block formatting on GitHub and other markdown viewers.