///

	Primeiro, instale <a href="https://github.com/Kludex/python-multipart" class="external-link" target="_blank">`python-multipart`</a>.

	Ex: `pip install python-multipart`.

	Isso ocorre porque o **OAuth2** usa "dados de um formulário" para mandar o **username** e **senha**.

Execute esse exemplo com:

<div class="termy">

```console
$ uvicorn main:app --reload

/** Static utility method for unchecked throwing of any {@link Throwable}. */
@GwtCompatible
final class SneakyThrows<T extends Throwable> {
  /**
   * Throws {@code t} as if it were an unchecked {@link Throwable}.
   *
   * <p>This method is useful primarily when we make a reflective call to a method with no {@code
   * throws} clause: Java forces us to handle an arbitrary {@link Throwable} from that method,

/** Static utility method for unchecked throwing of any {@link Throwable}. */
@GwtCompatible
final class SneakyThrows<T extends Throwable> {
  /**
   * Throws {@code t} as if it were an unchecked {@link Throwable}.
   *
   * <p>This method is useful primarily when we make a reflective call to a method with no {@code
   * throws} clause: Java forces us to handle an arbitrary {@link Throwable} from that method,

...y entonces Swagger UI ya no mostrará el resaltado de sintaxis:

<img src="/img/tutorial/extending-openapi/image03.png">

## Cambiar el tema

De la misma manera, podrías configurar el tema del resaltado de sintaxis con la clave `"syntaxHighlight.theme"` (ten en cuenta que tiene un punto en el medio):

{* ../../docs_src/configure_swagger_ui/tutorial002.py hl[3] *}

Esa configuración cambiaría el tema de color del resaltado de sintaxis:

você o importa e cria uma "instância" da mesma maneira que faria com a classe `FastAPI`:

```Python hl_lines="1  3" title="app/routers/users.py"
{!../../docs_src/bigger_applications/app/routers/users.py!}
```

### *Operações de Rota* com `APIRouter`

E então você o utiliza para declarar suas *operações de rota*.

Utilize-o da mesma maneira que utilizaria a classe  `FastAPI`:

```Python hl_lines="6  11  16" title="app/routers/users.py"

* <a href="https://github.com/encode/uvicorn/blob/master/uvicorn/middleware/proxy_headers.py" class="external-link" target="_blank">`ProxyHeadersMiddleware` de Uvicorn</a>
* <a href="https://github.com/florimondmanca/msgpack-asgi" class="external-link" target="_blank">MessagePack</a>

 * limitations under the License.
 */

package com.google.common;

import com.google.gwt.core.client.EntryPoint;

/**
 * A dummy entry point to convince Maven to compile our classes.
 *
 * @author Chris Povirk
 */
public class ForceGuavaCompilationEntryPoint implements EntryPoint {
  @Override
  public void onModuleLoad() {}

### Criando uma classe `Enum`

Importe `Enum` e crie uma sub-classe que herde de `str` e de `Enum`.

Por herdar de `str` a documentação da API vai ser capaz de saber que os valores devem ser do tipo `string` e assim ser capaz de mostrar eles corretamente.

Assim, crie atributos de classe com valores fixos, que serão os valores válidos disponíveis.

/// info

`Query`, `Path`, and other classes you will see later are subclasses of a common `Param` class.

All of them share the same parameters for additional validation and metadata you have seen.

///

/// note | Technical Details

When you import `Query`, `Path` and others from `fastapi`, they are actually functions.

That when called, return instances of classes of the same name.

  // can reuse it.
  public static <E extends Enum<?> & Feature<?>> void assertGoodFeatureEnum(
      Class<E> featureEnumClass) {
    Class<?>[] classes = featureEnumClass.getDeclaredClasses();
    for (Class<?> containedClass : classes) {
      if (containedClass.getSimpleName().equals("Require")) {
        if (containedClass.isAnnotation()) {