🔐 Custom Authentication System | MERN Stack

A secure and scalable custom authentication system built using the MERN stack (MongoDB, Express.js, React.js, Node.js). This project includes advanced authentication features such as JWT, email verification, 2FA, and secure cookie-based session management.

---

🚀 Features

• User Registration and Login
• JWT-based Authentication
• Multi-Factor Authentication (2FA)
• Email Verification with OTP
• Secure Cookies and Session Handling
• Input Validation and Error Responses
• RESTful API Architecture

---

🖥️ Tech Stack

• Frontend: Next.js
• Backend: Node.js, Express.js
• Database: MongoDB (Mongoose ODM)
• Security: JWT, Bcrypt, Email OTP, 2FA
• Libraries: Cookie-parser, CORS

---

⚙️ Setup & Run Locally

Clone the repository

git clone https://github.com/anujverma08/Authentication.git cd Authentication

Install frontend dependencies

cd frontend npm install

Install backend dependencies

cd ../backend npm install

Set up environment

Start the project

Terminal 1 – Start Backend (Node.js + Express)

cd backend npm run dev

Terminal 2 – Start Frontend (Next.js)

cd frontend npm run dev