This is a simple backend system built with Flask that allows users to sign up and log in using JWT-based REST API. This is only for learning authentication using JWT and it should not be used in production.

These are the requirements needed to run the project:

• Python 3.10+
• Poetry

• Log In: Users can log in to their account.
• JWT Authentication: Users can authenticate their requests with JWT.

This project uses the following technologies:

• Python: Python is a powerful, easy-to-learn, and widely-used programming language. It has efficient high-level data structures and a simple but effective approach to object-oriented programming.
• Flask: Flask is a micro web framework written in Python. It is classified as a microframework because it does not require particular tools or libraries.
• JWT: JSON Web Token (JWT) is an open standard (RFC 7519) that defines a compact and self-contained way for securely transmitting information between parties as a JSON object.

To run the project locally, you need to follow the below instructions:

git clone https://github.com/username/Flask_JWT_Auth.git

Install dependencies using Poetry, a Python dependency management tool. If you don't have Poetry, you can install it following the official guide.

Navigate to the project directory and install dependencies:

cd Flask_JWT_Auth
poetry install

After installing dependencies, start the development server:

poetry run python app.py

The server should start at http://127.0.0.1:5000.

You can now use the API endpoints to log in and make authenticated requests.

Note: This project uses environment variables to keep sensitive information like your secret key. Please make sure to create a .env file in your root directory and define SECRET_KEY variable.

The login endpoint expects a 'username' and 'password' in the POST request. In this simple project, 'username' can be any string and the 'password' is '123456'. In a real-world application, these would typically be validated against a database.

Note: This is a basic example of JWT authentication. In a real-world application, user credentials would typically be verified against a database and passwords would not be hardcoded in the backend. Passwords should always be hashed and stored securely.