That's because it is using the same name as in the OpenAPI spec. So that if you need to investigate more about any of these security schemes you can just copy and paste it to find more information about it.

The `oauth2_scheme` variable is an instance of `OAuth2PasswordBearer`, but it is also a "callable".

It could be called as:

```Python
oauth2_scheme(some, parameters)

```

</div>

### Étape 3: créer une *opération de chemin*

#### Chemin

Chemin, ou "path" fait référence ici à la dernière partie de l'URL démarrant au premier `/`.

Donc, dans un URL tel que :

```
https://example.com/items/foo
```

...le "path" serait :

```
/items/foo
```

!!! info