$response = [];
    $db = new DbHandler();
    if ($db->addTvSeriesToCollection($id_tv_series, $user_id)) {
        $response['error'] = FALSE;
    } else {
        $response['error'] = TRUE;
    }
    echoRespnse(200, $response);
});
/* get single tv_series */
$app->get('/collection/:id', 'authenticate', function ($id_tv_series) {
    global $user_id;
    $response = [];
    $db = new DbHandler();
    // fetch task
    $result = $db->getSingleTvSeries($id_tv_series);
    if ($result != NULL) {
        $response["error"] = false;
        $response["id"] = $result["id_tv_series"];
        $response["name"] = $result["tv_series_name"];
        $response["imdb_link"] = $result["imdb_link"];
        $response["likes"] = $result["count_like"];
        $response["rating"] = $result["count_rating"];
        $response["image"] = $result["default_image"];
        echoRespnse(200, $response);
    } else {
        $response["error"] = true;
        echoRespnse(404, $response);
    }
});
/* add/remove like to photos */