📇 Contact Manager App

A back-end contact management application built using Node.js, Express.js, MongoDB, and JWT authentication. This app allows users to register, log in, and securely manage their contacts with authentication and authorization.

🚀 Features

✅ User Authentication (Signup, Login) using JWT tokens

✅ Protected Routes with JWT middleware

✅ CRUD Operations for managing contacts (Create, Read, Update, Delete)

✅ MongoDB Integration using Mongoose

✅ Password Hashing with bcrypt.js for security

✅ Error Handling for better API responses

✅ RESTful API following best practices

🛠 Technologies Used

Node.js & Express.js – Backend framework

MongoDB & Mongoose – Database and ORM

JWT (JSON Web Token) – Authentication

bcrypt.js – Password hashing

dotenv – Environment variable management

Thunder Client– API testing

📌 Installation

Clone the repository:

git clone https://github.com/adarshupadhyay21/Contact_Manager_App.git

cd Contact_Manager_App

Install dependencies:

npm install

Set up the .env file:

Create a .env file in the root directory and add the following variables:

CONNECTION_STRING = your_mongodb_connection_string

ACCESS_TOKEN_SECRET = your_secret_key

PORT = 5001

Start the server:

npm start

The API will be running in your localhost at: http://localhost:5001

📡 API Endpoints

📡 API Endpoints

🔹 Auth Routes

  
    POST   /api/auth/register      // Register a new user
    POST   /api/auth/login         // User login
    GET    /api/auth/current       // Get the current logged-in user (Protected)
  

🔹 Contact Routes (Protected)

  
    GET    /api/contacts           // Get all contacts
    POST   /api/contacts           // Add a new contact
    GET    /api/contacts/:id       // Get a contact by ID
    PUT    /api/contacts/:id       // Update a contact by ID
    DELETE /api/contacts/:id       // Delete a contact by ID
  

🤝 Contributing

Contributions are welcome! Feel free to fork this repository, make your changes, and open a pull request for any feature or bug fix.