* A "token" is just a string with some content that we can use later to verify this user.
    * Normally, a token is set to expire after some time.
        * So, the user will have to log in again at some point later.
        * And if the token is stolen, the risk is less. It is not like a permanent key that will work forever (in most of the cases).

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

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

⚫️ 💪 🤙:

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

, ⚫️ 💪 ⚙️ ⏮️ `Depends`.

### ⚙️ ⚫️

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

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

    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!}
```

Em breve também criaremos o atual path operation.

!!! info "informação"
	Se você é um "Pythonista" muito rigoroso, você pode não gostar do estilo do nome do parâmetro `tokenUrl` em vez de `token_url`.