That way, using `secrets.compare_digest()` in your application code, it will be safe against this whole range of security attacks.

### Return the error

After detecting that the credentials are incorrect, return an `HTTPException` with a status code 401 (the same returned when no credentials are provided) and add the header `WWW-Authenticate` to make the browser show the login prompt again:

    get() {
      this.withLock {
        if (errorCode != null) {
          return false
        }
        if ((source.finished || source.closed) &&
          (sink.finished || sink.closed) &&
          hasResponseHeaders
        ) {
          return false
        }
        return true
      }
    }

  /** Returns true if this stream was created by this peer. */
  val isLocallyInitiated: Boolean

  }

  /**
   * Simply returns its argument.
   *
   * @deprecated no need to use this
   */
  @Deprecated
  public static <N> ImmutableGraph<N> copyOf(ImmutableGraph<N> graph) {
    return checkNotNull(graph);
  }

  @Override
  public ElementOrder<N> incidentEdgeOrder() {
    return ElementOrder.stable();
  }

		return false, "", errNoSuchUser
	}
	cred := u.Credentials
	if cred.IsTemp() {
		return true, cred.ParentUser, nil
	}

	return false, "", nil
}

// IsServiceAccount - returns if given key is a service account
func (sys *IAMSys) IsServiceAccount(name string) (bool, string, error) {
	if !sys.Initialized() {
		return false, "", errServerNotInitialized
	}

	u, found := sys.store.GetUser(name)
	if !found {

      return new Maps.SortedKeySet<>(this);
    }

    @Override
    @CheckForNull
    public Comparator<? super R> comparator() {
      return sortedBackingMap().comparator();
    }

    @Override
    public R firstKey() {
      return sortedBackingMap().firstKey();
    }

    @Override
    public R lastKey() {
      return sortedBackingMap().lastKey();
    }

    @Override

var altValueBuilders = []func() *Value{
	FromNull,
	func() *Value {
		return FromBool(false)
	},
	func() *Value {
		return FromBytes(nil)
	},
	func() *Value {
		return FromFloat(0)
	},
	func() *Value {
		return FromInt(0)
	},
	func() *Value {
		return FromTimestamp(time.Time{})
	},
	func() *Value {
		return FromString("")
	},
}

func TestValue_SameTypeAs(t *testing.T) {

      result.add(name(i))
    }
    return Collections.unmodifiableSet(result)
  }

  /** Returns an immutable list of the header values for `name`. */
  fun values(name: String): List<String> = commonValues(name)

  /**
   * Returns the number of bytes required to encode these headers using HTTP/1.1. This is also the
   * approximate size of HTTP/2 headers before they are compressed with HPACK. This value is

// the string as a value that satisfies error of type tagging.Error
func Errorf(format string, a ...interface{}) error {
	return Error{err: fmt.Errorf(format, a...)}
}

// Unwrap the internal error.
func (e Error) Unwrap() error { return e.err }

// Error 'error' compatible method.
func (e Error) Error() string {
	if e.err == nil {
		return "replication: cause <nil>"
	}

    checkNotNull(function);
    return new Future<O>() {

      @Override
      public boolean cancel(boolean mayInterruptIfRunning) {
        return input.cancel(mayInterruptIfRunning);
      }

      @Override
      public boolean isCancelled() {
        return input.isCancelled();
      }

      @Override
      public boolean isDone() {
        return input.isDone();
      }

  static <K, V> Map<K, V> newHashMapWithExpectedSize(int expectedSize) {
    return Maps.newHashMapWithExpectedSize(expectedSize);
  }

  static <K, V> Map<K, V> newLinkedHashMapWithExpectedSize(int expectedSize) {
    return Maps.newLinkedHashMapWithExpectedSize(expectedSize);
  }

  static <E> Set<E> newHashSetWithExpectedSize(int expectedSize) {
    return Sets.newHashSetWithExpectedSize(expectedSize);
  }