📝 To-Do List API (Node.js + Express + MongoDB)

This is a simple and secure To-Do List API built with Node.js, Express.js, MongoDB, and JWT authentication. It allows users to register, log in, and perform full CRUD operations (Create, Read, Update, Delete) on their to-do tasks.

---

🚀 Features

• 🔐 User registration and login with JWT authentication
• 🛡️ Protected routes using middleware
• 📝 Create personal to-do tasks
• 📃 Retrieve all tasks of a user
• 🧾 Update existing tasks
• ❌ Delete tasks by ID

---

⚙️ Tech Stack

• Node.js – JavaScript runtime
• Express.js – Web framework
• MongoDB – NoSQL database
• Mongoose – ODM for MongoDB
• JWT – JSON Web Token for authentication

---

📁 Project Structure

. ├── db/ │ ├── config.js # MongoDB connection │ ├── User.js # User schema │ └── Todo.js # Todo schema ├── index.js # Main API entry point

---

📦 Setup Instructions

1. Clone the repository:

   git clone https://github.com/your-username/todo-api.git
   cd todo-api
   

2. Install dependencies:

   npm install
   

3. Start MongoDB locally (or configure Atlas URI in db/config.js).

4. Run the server:

   node index.js

5. The server runs on http://localhost:5000

🔑 Authentication

All to-do routes are protected. Users must log in and pass the JWT token in the request header. ```bash auth: Bearer

---

📌 API Endpoints

✅ Authentication

Method	Route	Description
POST	/register	Register new user
POST	/login	Login and get token

📋 To-Do Operations (Requires Token)

Method	Route	Description
POST	/create	Create new to-do
GET	/todos/:author	Get all to-dos for a user
PUT	/update/:id	Update to-do by ID
DELETE	/delete/:id	Delete to-do by ID

---

📄 Sample JSON Body

🔐 Register / Login

{
  "email": "user@example.com",
  "password": "123456"
}

📝 Create a To-Do

{
  "name": "Buy groceries",
  "author": "user@example.com"
}

📜 License

This project is licensed for educational use. Contributions are welcome.

Made with 💻 by Ranadeb Saha

Let me know if you want this merged into your full README.md or need additional sections like DB schema or setup instructions.