def serialize_a_uuid(self, v):
            return str(v)

    @app.get("/get_custom_class")
    def return_some_user():
        # Test that the fix also works for custom pydantic classes
        return SomeCustomClass(a_uuid=MyUuid("b8799909-f914-42de-91bc-95c819218d01"))

    client = TestClient(app)

    with client:
        response_simple = client.get("/fast_uuid")

            if route.status_code is not None:
                status_code = str(route.status_code)
            else:
                # It would probably make more sense for all response classes to have an
                # explicit default status_code, and to extract it from them, instead of
                # doing this inspection tricks, that would probably be in the future

        «««
        <abbr title="Object Relational Mapper: a fancy term for a library where some classes represent SQL tables and instances represent rows in those tables">ORM</abbr>
        »»»

    Result (German):

        «««
        <abbr title="Objektrelationaler Mapper: Ein Fachbegriff für eine Bibliothek, in der einige Klassen SQL-Tabellen und Instanzen Zeilen in diesen Tabellen darstellen">ORM</abbr>
        »»»

## 0.122.0

### Fixes

* 🐛 Use `401` status code in security classes when credentials are missing. PR [#13786](https://github.com/fastapi/fastapi/pull/13786) by [@YuriiMotov](https://github.com/YuriiMotov).

                """
            ),
        ] = None,
        redirect_slashes: Annotated[
            bool,
            Doc(
                """
                Whether to detect and redirect slashes in URLs when the client doesn't
                use the same format.
                """
            ),
        ] = True,
        default: Annotated[
            Optional[ASGIApp],
            Doc(