A minimal Flask application demonstrating Auth0 authentication with cookie-based session persistence.

• Python 3.9+
• uv package manager
• An Auth0 account

1. Install dependencies:

uv sync

2. Fill in your Auth0 credentials in the .env file:

AUTH0_DOMAIN=your-tenant.auth0.com
AUTH0_CLIENT_ID=your-client-id
AUTH0_CLIENT_SECRET=your-client-secret
AUTH0_SECRET=<openssl rand -hex 32>
APP_BASE_URL=http://localhost:5000

3. In your Auth0 Dashboard, configure your application:

   • Allowed Callback URLs: http://localhost:5000/callback
   • Allowed Logout URLs: http://localhost:5000

4. Run the app:

uv run python server.py

• / — Shows login/signup links, or user profile if authenticated
• /login — Redirects to Auth0 Universal Login
• /callback — Handles the OAuth2 callback
• /logout — Clears session and redirects to Auth0 logout