* Sets the root artifact for the dependency graph.
         * This must not be confused with {@link #root(DependencyCoordinates)}: The root dependency, like any
         * other specified dependency, will be subject to dependency collection/resolution, i.e. should have an artifact
         * descriptor and a corresponding artifact file. The root artifact on the other hand is only used

   *
   * <p>Despite the method name, this method attempts to avoid actually copying the data when it is
   * safe to do so. The exact circumstances under which a copy will or will not be performed are
   * undocumented and subject to change.
   *
   * @throws IllegalArgumentException if two keys have the same value or two values have the same
   *     key
   * @throws NullPointerException if any key or value in {@code map} is null
   */

 *       captured by any of the steps in the pipeline are closed.
 * </ol>
 *
 * <h3>Starting a pipeline</h3>
 *
 * Start a {@code ClosingFuture} pipeline {@linkplain #submit(ClosingCallable, Executor) from a
 * callable block} that may capture objects for later closing. To start a pipeline from a {@link
 * ListenableFuture} that doesn't create resources that should be closed later, you can use {@link

## `/token` 경로 작업 수정

토큰의 만료 시각을 설정하기 위해 `timedelta` 를 생성합니다.

실제 JWT 액세스 토큰을 생성하여 반환합니다.

{* ../../docs_src/security/tutorial004_an_py310.py hl[118:133] *}

### JWT "주체(subject)" `sub`에 대한 기술 세부 사항

JWT 명세에 따르면 토큰의 주체를 포함하는 `sub`라는 키가 있습니다.

사용 여부는 선택사항이지만, 사용자의 식별 정보를 저장할 수 있으므로 여기서는 이를 사용합니다.

JWT는 사용자를 식별하고 사용자가 API를 직접 사용할 수 있도록 허용하는 것 외에도 다른 용도로 사용될 수도 있습니다.

     *
     * <p><b>Note:</b> in general, code should assume that the string form returned by {@code
     * ToStringHelper} for a given object may change. In particular, the list of types which are
     * checked for emptiness is subject to change. We currently check {@code CharSequence}s, {@code
     * Collection}s, {@code Map}s, optionals (including Guava's), and arrays.
     *
     * @since 33.4.0
     */
    @CanIgnoreReturnValue

      currentFuture.set(future);
      for (Callable<?> task : allTasks) {
        @SuppressWarnings("unused") // https://errorprone.info/bugpattern/FutureReturnValueIgnored
        Future<?> possiblyIgnoredError = executor.submit(task);
      }
      awaitUnchecked(barrier);
      assertThat(future.isDone()).isTrue();
      // inspect state and ensure it is correct!
      // asserts that all get calling threads received the same value

    CyclicBarrier barrier = new CyclicBarrier(threadCount);
    ImmutableList.Builder<Future<?>> futures = ImmutableList.builder();
    for (int i = 0; i < threadCount; i++) {
      futures.add(
          executor.submit(
              new Callable<@Nullable Void>() {
                @Override
                public @Nullable Void call() throws Exception {
                  barrier.await();

   *
   * <p>Despite the method name, this method attempts to avoid actually copying the data when it is
   * safe to do so. The exact circumstances under which a copy will or will not be performed are
   * undocumented and subject to change.
   *
   * <p>Note that if {@code list} is a {@code List<String>}, then {@code ImmutableList.copyOf(list)}
   * returns an {@code ImmutableList<String>} containing each of the strings in {@code list}, while

 *  New: `ConnectionPool.setPolicy()` configures a minimum connection pool size for a target
    address. Use this to proactively open HTTP connections.

    Connections opened to fulfill this policy are subject to the connection pool's
    `keepAliveDuration` but do not count against the pool-wide `maxIdleConnections` limit.

    This feature increases the client's traffic and the load on the server. Talking to your server's

        assertEquals("{errors.app.db.already.exists}", FessMessages.ERRORS_APP_DB_ALREADY_EXISTS);
        assertEquals("{errors.app.double.submit.request}", FessMessages.ERRORS_APP_DOUBLE_SUBMIT_REQUEST);
        assertEquals("{errors.login_error}", FessMessages.ERRORS_login_error);
        assertEquals("{errors.sso_login_error}", FessMessages.ERRORS_sso_login_error);