🚀 MERN Authentication Backend

A backend authentication system built using the MERN stack, following MVC architecture, with RESTful APIs for user registration and login. The APIs are tested using Postman, and user data is stored in ongoDB.

---

📌 Features

• User Registration (Sign Up)
• User Login (Sign In)
• RESTful API design
• MVC (Model–View–Controller) architecture
• MongoDB database integration
• API testing using Postman
• Environment variable management using dotenv

---

🛠️ Tech Stack

Node.js – Backend runtime Express.js – Web framework MongoDB – NoSQL database Mongoose – ODM for MongoDB Postman – API testing Git & GitHub – Version control Nodemon – Development tool

📂 Project Structure

mern-backend-auth/
│
├── index.js                
├── package.json           
├── README.md               n
│
├── config/
│   └── db.js              
│
├── models/
│   └── User.js            
│
├── controllers/
│   └── authController.js   
│
├── routes/
│   └── authRoutes.js      
│
└── .env                    

⚙️ Setup Instructions

1️⃣ Clone the repository

bash git clone https://github.com/prachi-sonii/mern-backend-auth.git cd mern-backend-auth

---

2️⃣ Install dependencies

bash npm install

---

3️⃣ Create .env file

env: PORT=5000 MONGO_URI=mongodb://127.0.0.1:27017/mern_auth

---

4️⃣ Run the server

bash:

npm run dev

Server will start at:

http://localhost:5000

---

🔗 API Endpoints

🔹 Register User

POST /api/auth/register

Request Body (JSON):

json { "name": "John Doe", "email": "john@gmail.com", "password": "123456" }

---

🔹 Login User

POST /api/auth/login

Request Body (JSON):

json { "email": "john@gmail.com", "password": "123456" }

---

🔄 Workflow (MVC)

Client (Postman / Frontend) ↓ Routes (Express) ↓ Controllers (Business Logic) ↓ Models (Mongoose) ↓ MongoDB Database ↓ Response to Client

---

🧪 Testing

• APIs tested using Postman
• Verified responses and database insertion
• MongoDB data verified using MongoDB Compass

---

🎓 Learning Outcomes

• Understood and implemented MVC architecture
• Built RESTful APIs using Express
• Connected backend to MongoDB using Mongoose
• Debugged real-world backend issues
• Used Git & GitHub for project versioning

---