## Conditional OpenAPI from settings and env vars

You can easily use the same Pydantic settings to configure your generated OpenAPI and the docs UIs.

For example:

```Python hl_lines="6  11"
{!../../../docs_src/conditional_openapi/tutorial001.py!}
```

Here we declare the setting `openapi_url` with the same default of `"/openapi.json"`.

And then we use it when creating the `FastAPI` app.

* ⚒ 💭 👆 ✔️ 👍 🔬 Pydantic 🏷 👆 📨 💪 & 📨.
* 🔗 🙆 ✔ ✔ & 🔑 ⚙️ 🔗.
* 🙅 🏪 🔢 🔐, 🕴 🔐#️⃣.
* 🛠️ & ⚙️ 👍-💭 🔐 🧰, 💖 🇸🇲 & 🥙 🤝, ♒️.
* 🚮 🌅 🧽 ✔ 🎛 ⏮️ Oauth2️⃣ ↔ 🌐❔ 💪.
* ...♒️.

👐, 👆 5️⃣📆 ✔️ 📶 🎯 ⚙️ 💼 🌐❔ 👆 🤙 💪 ❎ 🛠️ 🩺 🌐 (✅ 🏭) ⚖️ ⚓️ 🔛 📳 ⚪️➡️ 🌐 🔢.

## 🎲 🗄 ⚪️➡️ ⚒ & 🇨🇻 {

👆 💪 💪 ⚙️ 🎏 Pydantic ⚒ 🔗 👆 🏗 🗄 & 🩺 ⚜.

🖼:

```Python hl_lines="6  11"