<li class="nav-item">
						<a href="${fe:url('/admin/dict/')}" class="nav-link <c:if test="${param.menuType=='dict'}">active</c:if>" <c:if test="${param.menuType=='dict'}">aria-current="page"</c:if>>
							<i class='fa fa-book nav-icon' aria-hidden="true"></i>
							<p><la:message key="labels.menu_dict" /></p>
						</a>
					</li>
					</c:if>
					<c:if test="${fe:permission('admin-accesstoken-view')}">
					<li class="nav-item">

   * might not (and the answer might change while we're building the array).
   *
   * TODO: cpovirk - Is this an issue anywhere anymore? It looks to have been fixed for Java 8
   * (https://bugs.openjdk.org/browse/JDK-7121314) and before Lollipop
   * (https://r.android.com/47508). We *would* need to worry for J2KT, whose own concurrency support

///

Наприклад, цей кастомний валідатор перевіряє, чи починається ID елемента з `isbn-` для номера книги <abbr title="International Standard Book Number - Міжнародний стандартний номер книги">ISBN</abbr> або з `imdb-` для ID URL фільму на <abbr title="Internet Movie Database - Інтернетна база даних фільмів: вебсайт з інформацією про фільми">IMDB</abbr>:

   * might not (and the answer might change while we're building the array).
   *
   * TODO: cpovirk - Is this an issue anywhere anymore? It looks to have been fixed for Java 8
   * (https://bugs.openjdk.org/browse/JDK-7121314) and before Lollipop
   * (https://r.android.com/47508). We *would* need to worry for J2KT, whose own concurrency support

///

Например, эта кастомная проверка убеждается, что ID элемента начинается с `isbn-` для номера книги <abbr title="International Standard Book Number - Международный стандартный книжный номер">ISBN</abbr> или с `imdb-` для ID URL фильма на <abbr title="Internet Movie Database - Интернетная база данных фильмов: веб‑сайт с информацией о фильмах">IMDB</abbr>:

- how to incorporate the metadata processor to start with
- create a hook to programmatically configure the test
- create a plugin processor
- directory
- jar
- hooks for loading

- I could make an annotation that marked another class as its plugin discoverer, I could just add it to
  the component descriptor and when it's loaded we can add the discoverer, that would be simpler. I could

  // * We are more responsive to completion than timeouts. This is because parkNanos depends on
  //   system scheduling and as such we could either miss our deadline, or unpark() could be delayed
  //   so that it looks like we timed out even though we didn't. For comparison FutureTask respects
  //   completion preferably and AQS is non-deterministic (depends on where in the queue the waiter

      annotatedTypeExists()
          ? NullnessAnnotationReader.FROM_DECLARATION_AND_TYPE_USE_ANNOTATIONS
          : NullnessAnnotationReader.FROM_DECLARATION_ANNOTATIONS_ONLY;

  /**
   * Looks for declaration nullness annotations and, if supported, type-use nullness annotations.
   *
   * <p>Under Android VMs, the methods for retrieving type-use annotations don't exist. This means

        }
      }
    }
  }

  /**
   * Checks that a Hasher returns the same HashCode when given the same input, and also that the
   * collision rate looks sane.
   */
  static void assertInvariants(HashFunction hashFunction) {
    int objects = 100;
    Set<HashCode> hashcodes = Sets.newHashSetWithExpectedSize(objects);
    Random random = new Random(314159);

さらに、フロントエンドが**ユーザー名**と**パスワード**を使って、バックエンドで認証する方法を用意したいです。

**FastAPI**では、これを**OAuth2**を使用して構築できます。

ですが、ちょっとした必要な情報を探すために、長い仕様のすべてを読む必要はありません。

**FastAPI**が提供するツールを使って、セキュリティを制御してみましょう。

## どう見えるか { #how-it-looks }

まずはこのコードを使って、どう動くか観察します。その後で、何が起こっているのか理解しましょう。

## `main.py`を作成 { #create-main-py }

`main.py`に、下記の例をコピーします:

{* ../../docs_src/security/tutorial001_an_py310.py *}

## 実行 { #run-it }