medical_center_web/
├── app.py
├── database.py          ← your file (unchanged)
├── auth.py              ← your file (unchanged)
├── utils/
│   └── helpers.py       ← create empty for now
├── static/
│   └── bg.png           ← your background image
├── templates/
│   ├── base.html
│   └── login.html
└── requirements.txt