How can I implement user authentication in a Flask RESTful API?

How can I implement user authentication in a Flask RESTful API?

You can use Flask-RESTful along with Flask-JWT-Extended to handle user authentication. Would you like a code example?

Yes, please provide a code example for user registration and login.

Sure! Here's a simple example:

from flask import Flask, request
from flask_restful import Resource, Api
from flask_jwt_extended import JWTManager, create_access_token

app = Flask(__name__)
app.config['JWT_SECRET_KEY'] = 'your_secret_key'
jwt = JWTManager(app)
api = Api(app)

users = {}  # In-memory user storage

class UserRegister(Resource):
    def post(self):
        username = request.json.get('username')
        password = request.json.get('password')
        users[username] = password  # Store user
        return {'message': 'User created successfully.'}, 201

class UserLogin(Resource):
    def post(self):
        username = request.json.get('username')
        password = request.json.get('password')
        if users.get(username) == password:
            access_token = create_access_token(identity=username)
            return {'access_token': access_token}, 200
        return {'message': 'Invalid credentials'}, 401

api.add_resource(UserRegister, '/register')
api.add_resource(UserLogin, '/login')

if __name__ == '__main__':
    app.run(debug=True)

This code sets up user registration and login endpoints.

What about securing the API endpoints?

You can secure your API endpoints by using the @jwt_required() decorator from Flask-JWT-Extended. This ensures that only authenticated users can access those endpoints.