This project implements a user cart API with JWT-based authentication using Python and FastAPI. It allows users to register, login, and manage their shopping carts by adding, updating, and deleting products.

• User registration and login with password hashing
• JWT-based authentication for protected routes
• Adding, updating, and deleting products in the user's cart
• Aggregated cart information including total price and total quantity
• Integration with a coupon code functionality for applying discounts

• Python
• FastAPI
• Uvicorn (for running the server)
• PyJWT
• Passlib
• Pydantic

1. Clone the repository:

Replace <repository-url> with the URL of this GitHub repository.

2. Install the required dependencies using pip:

3. Start the server:

The server should now be running on http://localhost:8000.

• POST /users/register: Register a new user.
• POST /users/login: Login with username and password to obtain an access token.
• GET /users/me: Get the current user's information.
• POST /cart/add: Add a product to the user's cart.

Note: Please refer to the code for additional API endpoints related to managing the cart.

This API uses JWT-based authentication. To access protected routes, include the JWT access token in the Authorization header of your requests: Replace <access-token> with the access token obtained from the login endpoint.

• User data is stored in a JSON file (data/users.json).
• Product data is stored in a JSON file (data/products.json).
• Cart data is stored in separate JSON files for each user (data/cart_<username>.json).

Contributions to this project are welcome. Feel free to open issues and submit pull requests to suggest improvements or add new features.

This project is licensed under the MIT License.