Esto puede hacer mucho más fácil para tus usuarios **implementar sus APIs** para recibir tus requests de **webhook**, incluso podrían ser capaces de autogenerar algo de su propio código de API.

/// info | Información

Los webhooks están disponibles en OpenAPI 3.1.0 y superiores, soportados por FastAPI `0.99.0` y superiores.

///

## Una aplicación con webhooks

        assertEquals("1guest", permissionHelper.encode("(allow){user}guest"));
        assertEquals("Rguest", permissionHelper.encode("(allow){role}guest"));
        assertEquals("2guest", permissionHelper.encode("(allow){group}guest"));
        assertEquals("1guest", permissionHelper.encode("(allow){USER}guest"));
        assertEquals("Rguest", permissionHelper.encode("(allow){ROLE}guest"));

#### Pydantic's `.dict()`

`user_in` ist ein Pydantic-Modell der Klasse `UserIn`.

Pydantic-Modelle haben eine `.dict()`-Methode, die ein `dict` mit den Daten des Modells zurückgibt.

Wenn wir also ein Pydantic-Objekt `user_in` erstellen, etwa so:

```Python
user_in = UserIn(username="john", password="secret", email="******@****.***")
```

und wir rufen seine `.dict()`-Methode auf:

```Python

 *
 * <p>The classes in this package include:
 *
 * <h2>Immutable collections</h2>
 *
 * These are collections whose contents will never change. They also offer a few additional
 * guarantees (see {@link ImmutableCollection} for details). Implementations are available for both
 * the JDK collection types and the Guava collection types (listed below).
 *
 * <h2>Collection types</h2>

 *
 * <p>The classes in this package include:
 *
 * <h2>Immutable collections</h2>
 *
 * These are collections whose contents will never change. They also offer a few additional
 * guarantees (see {@link ImmutableCollection} for details). Implementations are available for both
 * the JDK collection types and the Guava collection types (listed below).
 *
 * <h2>Collection types</h2>

iam-assets/policies.json {"consoleAdmin":{"Version":"2012-10-17","Statement":[{"Effect":"Allow","Action":["admin:*"]},{"Effect":"Allow","Action":["kms:*"]},{"Effect":"Allow","Action":["s3:*"],"Resource":["arn:aws:s3:::*"]}]},diagnostics":{"Version":"2012-10-17","Statement":[{"Effect":"Allow","Action":["admin:TopLocksInfo","admin:BandwidthMonitor","admin:ConsoleLog","admin:OBDInfo","admin:Profiling","admin:Prometheus","admin:ServerInfo","admin:ServerTrace"],"Resource":["arn:aws:s3:::*"]}]},rea...

     i) effectively disclaims on behalf of all other Contributors all
     warranties and conditions, express and implied, including
     warranties or conditions of title and non-infringement, and
     implied warranties or conditions of merchantability and fitness
     for a particular purpose;

     ii) effectively excludes on behalf of all other Contributors all
     liability for damages, including direct, indirect, special,

# Header Parameter Models { #header-parameter-models }

If you have a group of related **header parameters**, you can create a **Pydantic model** to declare them.

This would allow you to **re-use the model** in **multiple places** and also to declare validations and metadata for all the parameters at once. 😎

/// note

This is supported since FastAPI version `0.115.0`. 🤓

///

///

## Integriert in OpenAPI

Alle Requestdeklarationen, -validierungen und -anforderungen Ihrer Abhängigkeiten (und Unterabhängigkeiten) werden in dasselbe OpenAPI-Schema integriert.

Die interaktive Dokumentation enthält also auch alle Informationen aus diesen Abhängigkeiten:

<img src="/img/tutorial/dependencies/image01.png">

## Einfache Verwendung

 * mask of the ACE, the whole access check fails. If the ACE is an "allow"
 * ACE and <i>all</i> of the bits in the desired access bits match bits in
 * the access mask of the ACE, the access check is successful. Otherwise,
 * more ACEs are evaluated until all desired access bits (combined)
 * are "allowed". If all of the desired access bits are not "allowed"
 * the then same process is repeated for inherited ACEs.
 * <p>