```

But that is still not that useful.

Let's make it give us the current user.

## Create a user model

First, let's create a Pydantic user model.

The same way we use Pydantic to declare bodies, we can use it anywhere else:

=== "Python 3.10+"

    ```Python hl_lines="5  12-16"
    {!> ../../../docs_src/security/tutorial002_an_py310.py!}
    ```

=== "Python 3.9+"

!!! warning "Attention"
    Ceci concerne un sujet plutôt avancé.

    Si vous débutez avec **FastAPI**, vous n'en aurez peut-être pas besoin.

Vous pouvez déclarer des réponses supplémentaires, avec des codes HTTP, des types de médias, des descriptions, etc.

Ces réponses supplémentaires seront incluses dans le schéma OpenAPI, elles apparaîtront donc également dans la documentation de l'API.

    * Durch die Verwendung von FastAPI sparen Sie also Entwicklungszeit, Fehler und Codezeilen und würden wahrscheinlich die gleiche Leistung (oder eine bessere) erzielen, die Sie hätten, wenn Sie es nicht verwenden würden (da Sie alles in Ihrem...

Sie verfügt über eine *Pfadoperation*, die einen `Invoice`-Body empfängt, und einen Query-Parameter `callback_url`, der die URL für den Callback enthält.

Dieser Teil ist ziemlich normal, der größte Teil des Codes ist Ihnen wahrscheinlich bereits bekannt:

```Python hl_lines="9-13  36-53"
{!../../../docs_src/openapi_callbacks/tutorial001.py!}
```

!!! tip "Tipp"

It is designed to have functions that receive two parameters, one "request" and one "response". Then you "read" parts from the request, and "write" parts to the response. Because of this design, it is not possible to declare request parameters and bodies with standard Python type hints as function parameters.

* To check the 2-letter code for the language you want to translate, you can use the table <a href="https://en.wikipedia.org/wiki/List_of_ISO_639-1_codes" class="external-link" target="_blank">List of ISO 639-1 codes</a>.

#### Existing language

Let's say you want to translate a page for a language that already has translations for some pages, like Spanish.

* ⚙️ 🎏 🐍 🖼 & 🕴 💬 ✍ 🩺. 👆 🚫 ✔️ 🔀 🕳 👉 👷.

* ⚙️ 🎏 🖼, 📁 📛, & 🔗. 👆 🚫 ✔️ 🔀 🕳 ⚫️ 👷.

* ✅ 2️⃣-🔤 📟 🇪🇸 👆 💚 💬 👆 💪 ⚙️ 🏓 <a href="https://en.wikipedia.org/wiki/List_of_ISO_639-1_codes" class="external-link" target="_blank">📇 💾 6️⃣3️⃣9️⃣-1️⃣ 📟</a>.

#### ♻ 🇪🇸

➡️ 💬 👆 💚 💬 📃 🇪🇸 👈 ⏪ ✔️ ✍ 📃, 💖 🇪🇸.

💼 🇪🇸, 2️⃣-🔤 📟 `es`. , 📁 🇪🇸 ✍ 🔎 `docs/es/`.

!!! tip

但是你也希望它能够接受新的条目。并且当这些条目不存在时，会自动创建并返回 201 「创建」的 HTTP 状态码。

要实现它，导入 `JSONResponse`，然后在其中直接返回你的内容，并将 `status_code` 设置为为你要的值。

```Python hl_lines="4  25"
{!../../../docs_src/additional_status_codes/tutorial001.py!}
```

!!! warning "警告"
    当你直接返回一个像上面例子中的 `Response` 对象时，它会直接返回。

    FastAPI 不会用模型等对该响应进行序列化。

    确保其中有你想要的数据，且返回的值为合法的 JSON（如果你使用 `JSONResponse` 的话）。

!!! note "技术细节"

## Use cases

Some use cases include:

* Converting non-JSON request bodies to JSON (e.g. <a href="https://msgpack.org/index.html" class="external-link" target="_blank">`msgpack`</a>).
* Decompressing gzip-compressed request bodies.
* Automatically logging all request bodies.

## Handling custom request body encodings

If you want to secure your API, there are several better things you can do, for example:

* Make sure you have well defined Pydantic models for your request bodies and responses.
* Configure any required permissions and roles using dependencies.
* Never store plaintext passwords, only password hashes.
* Implement and use well-known cryptographic tools, like Passlib and JWT tokens, etc.