public function index(Response $response)
    {
        $payload = [
            'resources' => route('v1.books.index'),
            'authors' => route('v1.authors.index'),
        ];

        return $response->setMeta([
            'message' => "Hello, I'm a appkr/api example",
            'version' => 1,
            'documentation' => route('v1.doc'),
        ])->respond([
            'link' => $payload,
        ]);
    }