public static function all($page = 1, $per_page = 10, $order_by = 'latest')
    {
        $photos = self::get("/photos", [
            'query' => ['page' => $page, 'per_page' => $per_page, 'order_by' => $order_by]
        ]);

        $photosArray = self::getArray($photos->getBody(), get_called_class());

        return new ArrayObject($photosArray, $photos->getHeaders());
    }