<span style="color: green;">INFO</span>:     Started server process [28722]
<span style="color: green;">INFO</span>:     Waiting for application startup.
<span style="color: green;">INFO</span>:     Application startup complete.
```

</div>

!!! note
    `uvicorn main:app` 命令含义如下:

    * `main`：`main.py` 文件（一个 Python「模块」）。
    * `app`：在 `main.py` 文件中通过 `app = FastAPI()` 创建的对象。
    * `--reload`：让服务器在更新代码后重新启动。仅在开发时使用该选项。

<span style="color: green;">INFO</span>:     Started server process [28722]
<span style="color: green;">INFO</span>:     Waiting for application startup.
<span style="color: green;">INFO</span>:     Application startup complete.
```

</div>

**Khuyến khích** bạn viết hoặc sao chép code, sửa và chạy nó ở local.

<span style="color: green;">INFO</span>:     Started server process [28722]
<span style="color: green;">INFO</span>:     Waiting for application startup.
<span style="color: green;">INFO</span>:     Application startup complete.
```

</div>

Se **RECOMIENDA** que escribas o copies el código, lo edites y lo ejecutes localmente.

<span style="color: green;">INFO</span>:     Started server process [28722]
<span style="color: green;">INFO</span>:     Waiting for application startup.
<span style="color: green;">INFO</span>:     Application startup complete.
```

</div>

**SANGAT disarankan** agar kamu menulis atau menyalin kode, mengubahnya dan menjalankannya secara lokal.

<span style="color: green;">INFO</span>:     Started server process [28722]
<span style="color: green;">INFO</span>:     Waiting for application startup.
<span style="color: green;">INFO</span>:     Application startup complete.
```

</div>

Il est **FORTEMENT encouragé** que vous écriviez ou copiez le code, l'éditiez et l'exécutiez localement.

# Simple OAuth2 with Password and Bearer

Now let's build from the previous chapter and add the missing parts to have a complete security flow.

## Get the `username` and `password`

We are going to use **FastAPI** security utilities to get the `username` and `password`.

OAuth2 specifies that when using the "password flow" (that we are using) the client/user must send a `username` and `password` fields as form data.

    return sorted(docs_path.iterdir())


def lang_callback(lang: Optional[str]) -> Union[str, None]:
    if lang is None:
        return None
    lang = lang.lower()
    return lang


def complete_existing_lang(incomplete: str):
    lang_path: Path
    for lang_path in get_lang_paths():
        if lang_path.is_dir() and lang_path.name.startswith(incomplete):
            yield lang_path.name


@app.callback()

<font color="#4E9A06">INFO</font>:     Started server process [<font color="#06989A">2265873</font>]
<font color="#4E9A06">INFO</font>:     Waiting for application startup.
<font color="#4E9A06">INFO</font>:     Application startup complete.
</pre>
```

</div>

It is **HIGHLY encouraged** that you write or copy the code, edit it and run it locally.

* **Poucos bugs**: Reduz cerca de 40% de erros induzidos por humanos (desenvolvedores). *
* **Intuitivo**: Grande suporte a _IDEs_. <abbr title="também conhecido como _auto-complete_, _autocompletion_, _IntelliSense_">_Auto-Complete_</abbr> em todos os lugares. Menos tempo debugando.
* **Fácil**: Projetado para ser fácil de aprender e usar. Menos tempo lendo documentação.

<span style="color: green;">INFO</span>:     Started server process [28722]
<span style="color: green;">INFO</span>:     Waiting for application startup.
<span style="color: green;">INFO</span>:     Application startup complete.
```

</div>

Es wird **ausdrücklich empfohlen**, dass Sie den Code schreiben oder kopieren, ihn bearbeiten und lokal ausführen.