Both of these dependencies will just return an HTTP error if the user doesn't exist, or if is inactive.

So, in our endpoint, we will only get a user if the user exists, was correctly authenticated, and is active:

{* ../../docs_src/security/tutorial003_an_py310.py hl[58:66,69:74,94] *}

/// info

                    syncContext.acquire(null, Collections.singleton(metadata));

                    if (metadata.getPath() != null && Files.exists(metadata.getPath())) {
                        try (InputStream in = Files.newInputStream(metadata.getPath())) {
                            versioning = new Versioning(

            if (v4Factory == null) {
                return null;
            }
            return createV3FactoryBridgeForV4Factory(v4Factory);
        } catch (Exception e) {
            // If lookup fails, no v4 factory exists for this type
            return null;
        }
    }

    /**
     * Creates a v3 ToolchainFactory bridge that wraps a specific v4 ToolchainFactory instance.
     */

   * @param target a primitive {@code char} value
   * @return the least index {@code i} for which {@code array[i] == target}, or {@code -1} if no
   *     such index exists.
   */
  public static int indexOf(char[] array, char target) {
    return indexOf(array, target, 0, array.length);
  }

  // TODO(kevinb): consider making this public

   * @param target a primitive {@code short} value
   * @return the least index {@code i} for which {@code array[i] == target}, or {@code -1} if no
   *     such index exists.
   */
  public static int indexOf(short[] array, short target) {
    return indexOf(array, target, 0, array.length);
  }

  // TODO(kevinb): consider making this public

   * @param target a primitive {@code short} value
   * @return the least index {@code i} for which {@code array[i] == target}, or {@code -1} if no
   *     such index exists.
   */
  public static int indexOf(short[] array, short target) {
    return indexOf(array, target, 0, array.length);
  }

  // TODO(kevinb): consider making this public

		keyInfos[i].Name = names[i]
	}
	return keyInfos, continueAt, nil
}

// CreateKey tries to create a new key at the KMS with the
// given key ID.
//
// If the a key with the same keyID already exists then
// CreateKey returns kes.ErrKeyExists.
func (c *kesConn) CreateKey(ctx context.Context, req *CreateKeyRequest) error {
	if err := c.client.CreateKey(ctx, req.Name); err != nil {
		if errors.Is(err, kes.ErrKeyExists) {

If it doesn't see an `Authorization` header, or the value doesn't have a `Bearer ` token, it will respond with a 401 status code error (`UNAUTHORIZED`) directly.

You don't even have to check if the token exists to return an error. You can be sure that if your function is executed, it will have a `str` in that token.

You can try it already in the interactive docs:

<img src="/img/tutorial/security/image03.png">

		}

		datas, ok := identityMap[utils.ToStringKey(fieldValues...)]
		if !ok {
			return fmt.Errorf("failed to assign association %#v, make sure foreign fields exists", elem.Interface())
		}

		for _, data := range datas {
			reflectFieldValue := rel.Field.ReflectValueOf(tx.Statement.Context, data)
			if reflectFieldValue.Kind() == reflect.Ptr && reflectFieldValue.IsNil() {

   */
  boolean containsValue(@CompatibleWith("V") @Nullable Object value);

  /**
   * Returns the value corresponding to the given row and column keys, or {@code null} if no such
   * mapping exists.
   *
   * @param rowKey key of row to search for
   * @param columnKey key of column to search for
   */
  @Nullable V get(
      @CompatibleWith("R") @Nullable Object rowKey,