👈 ↩️ ⚫️ ⚙️ 🎏 📛 🗄 🔌. 👈 🚥 👆 💪 🔬 🌅 🔃 🙆 👫 💂‍♂ ⚖ 👆 💪 📁 & 📋 ⚫️ 🔎 🌖 ℹ 🔃 ⚫️.

`oauth2_scheme` 🔢 👐 `OAuth2PasswordBearer`, ✋️ ⚫️ "🇧🇲".

⚫️ 💪 🤙:

```Python
oauth2_scheme(some, parameters)
```

, ⚫️ 💪 ⚙️ ⏮️ `Depends`.

### ⚙️ ⚫️

🔜 👆 💪 🚶‍♀️ 👈 `oauth2_scheme` 🔗 ⏮️ `Depends`.

```Python hl_lines="10"
{!../../../docs_src/security/tutorial001.py!}
```

A variável `oauth2_scheme` é um instância de `OAuth2PasswordBearer`, mas também é um "callable".

Pode ser chamada de:

```Python
oauth2_scheme(some, parameters)
```

Então, pode ser usado com `Depends`.

## Use-o

Agora você pode passar aquele `oauth2_scheme` em uma dependência com `Depends`.

```Python hl_lines="10"

    这种命名方式是因为要使用与 OpenAPI 规范中相同的名字。以便在深入校验安全方案时，能通过复制粘贴查找更多相关信息。

`oauth2_scheme` 变量是 `OAuth2PasswordBearer` 的实例，也是**可调用项**。

以如下方式调用：

```Python
oauth2_scheme(some, parameters)
```

因此，`Depends` 可以调用 `oauth2_scheme` 变量。

### 使用

接下来，使用 `Depends` 把 `oauth2_scheme` 传入依赖项。

```Python hl_lines="10"
{!../../../docs_src/security/tutorial001.py!}
```

    In that case, **FastAPI** also provides you with the tools to build it.

When we create an instance of the `OAuth2PasswordBearer` class we pass in the `tokenUrl` parameter. This parameter contains the URL that the client (the frontend running in the user's browser) will use to send the `username` and `password` in order to get a token.

=== "Python 3.9+"

    ```Python hl_lines="8"