Graphql return null values

Schema.graphqls

type Query {
    getGoogleMedia: [GoogleMedia] @resolver(class: "Test\LocationData\Model\Resolver\GoogleMediaResolver")
}
type GoogleMedia {
    image_view_all_link: String
    images: GooglePhotos
    video_view_all_link: String
    videos: GoogleVideos
}
type GooglePhotos {
    id: Int
    review_id: String
    image: String
}
type GoogleVideos {
    id: Int
    review_id: String
    video_link: String
}

GoogleMediaResolver

$connection = $this->resourceConnection->getConnection();
        $viewAllImagesLink = $this->scopeConfig->getValue('google_location_data/google_photos_api/google_photos_view_all_url', MagentoStoreModelScopeInterface::SCOPE_STORE);
        $viewAllVideosLink = $this->scopeConfig->getValue('google_location_data/google_videos_api/google_videos_view_all_url', MagentoStoreModelScopeInterface::SCOPE_STORE);
        $tableNamePhotos = $connection->getTableName('test_google_photos');
        $tableNameVideos = $connection->getTableName('test_google_video');
        // Fetch photos
        $selectPhotos = $connection->select()
            ->from($tableNamePhotos, ['id', 'review_id', 'image'])
            ->where('show_in_website = ?', 1);
        $photos = $connection->fetchAll($selectPhotos);

        // Fetch videos
        $selectVideos = $connection->select()
            ->from($tableNameVideos, ['id', 'review_id', 'video_link'])
            ->where('show_in_website = ?', 1);
        $videos = $connection->fetchAll($selectVideos);

        // Format the response
        $response = [
            'image_view_all_link' => $viewAllImagesLink,
            'images' => $photos,
            'video_view_all_link' => $viewAllImagesLink,
            'videos' => $videos,
        ];
        // print_r($response);exit;
        return $response;

but I am getting null.

If I do print_r($response) I am getting the correct values.