🔐 Login & Register System (Flask + SQL)

A modern authentication system built with Flask and SQLite.

This project demonstrates how real websites handle:

• User registration
• Secure login
• Password hashing
• Sessions
• Protected dashboard
• SQL database storage

Perfect foundation for SaaS apps, dashboards, admin panels, and AI tools with accounts.

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✨ Features

✅ Register new users
✅ Login authentication
✅ Password hashing (secure)
✅ SQLite database
✅ Session management
✅ Protected routes
✅ Logout system
✅ Modern responsive UI

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🛠 Tech Stack

• Python
• Flask
• SQLite
• HTML/CSS
• Werkzeug security

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📸 Screenshot

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▶️ Run Locally

1. Install dependencies

pip install flask werkzeug

2. Start server

python app.py

3. Open browser http://127.0.0.1:5000

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🧪 Tests

pip install -r requirements-dev.txt
python -m pytest -q

Tests cover registration (validation, persistence, duplicate user), login (valid/invalid credentials, 5-attempt lockout, attempt reset on success), session-protected dashboard, logout, and guest redirects, using an isolated SQLite database per run. CI runs the suite on every push.

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🧠 What I Learned

• Building authentication systems
• Working with SQL databases
• Password hashing & security
• Sessions & cookies
• Backend development with Flask

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👨‍💻 Author

Darshan Kachare
AI Developer • SaaS Builder • Automation Tools