## **FastAPI**'s `OAuth2PasswordBearer`

**FastAPI** fornece várias ferramentas, em diferentes níveis de abstração, para implementar esses recursos de segurança.

Neste exemplo, nós vamos usar o **OAuth2** com o fluxo de **Senha**, usando um token **Bearer**. Fazemos isso usando a classe `OAuth2PasswordBearer`.

!!! info "informação"

    return count;
  }

  /**
   * Reverses the elements of {@code array}. This is equivalent to {@code
   * Collections.reverse(Booleans.asList(array))}, but is likely to be more efficient.
   *
   * @since 23.1
   */
  public static void reverse(boolean[] array) {
    checkNotNull(array);
    reverse(array, 0, array.length);
  }

  /**

  }

  /**
   * Reverses the elements of {@code array}. This is equivalent to {@code
   * Collections.reverse(Chars.asList(array))}, but is likely to be more efficient.
   *
   * @since 23.1
   */
  public static void reverse(char[] array) {
    checkNotNull(array);
    reverse(array, 0, array.length);
  }

  /**

    Un "path" también se conoce habitualmente como "endpoint", "route" o "ruta".

Cuando construyes una API, el "path" es la manera principal de separar los <abbr title="en inglés: separation of concerns">"intereses"</abbr> y los "recursos".

#### Operación

"Operación" aquí se refiere a uno de los "métodos" de HTTP.

Uno como:

* `POST`
* `GET`
* `PUT`
* `DELETE`

...y los más exóticos:

* `OPTIONS`

!!! note "Observação"
    Tenha em mente que cada ferramenta oferece diferentes níveis de suporte ao OpenAPI.

    Algumas delas não exibem todas as informações extras que declaramos, ainda que na maioria dos casos, esses recursos estão planejados para desenvolvimento.

Você pode adicionar um `title`:

```Python hl_lines="10"
{!../../../docs_src/query_params_str_validations/tutorial007.py!}
```

E uma `description`:

  }

  /**
   * Reverses the elements of {@code array}. This is equivalent to {@code
   * Collections.reverse(Doubles.asList(array))}, but is likely to be more efficient.
   *
   * @since 23.1
   */
  public static void reverse(double[] array) {
    checkNotNull(array);
    reverse(array, 0, array.length);
  }

  /**

  }

  /**
   * Reverses the elements of {@code array}. This is equivalent to {@code
   * Collections.reverse(Floats.asList(array))}, but is likely to be more efficient.
   *
   * @since 23.1
   */
  public static void reverse(float[] array) {
    checkNotNull(array);
    reverse(array, 0, array.length);
  }

  /**

          handshakeCertificates2.sslSocketFactory(),
          handshakeCertificates2.trustManager,
        )
        .build()

    // This client fails to connect because the new SSL socket factory refuses.
    assertFailsWith<IOException> {
      anotherClient.newCall(request).execute()
    }.also { expected ->
      when (expected) {
        is SSLException, is TlsFatalAlert -> {}
        else -> throw expected

   * combinations of methods, then checks compare(), binarySearch() and so
   * forth on each one.
   */

  // should periodically try increasing this, but it makes the test run long
  private static final int RECURSE_DEPTH = 2;

  public void testCombinationsExhaustively_startingFromNatural() {
    testExhaustively(Ordering.<String>natural(), "a", "b", "d");
  }

  @GwtIncompatible // too slow

   * combinations of methods, then checks compare(), binarySearch() and so
   * forth on each one.
   */

  // should periodically try increasing this, but it makes the test run long
  private static final int RECURSE_DEPTH = 2;

  public void testCombinationsExhaustively_startingFromNatural() {
    testExhaustively(Ordering.<String>natural(), "a", "b", "d");
  }

  @GwtIncompatible // too slow