public function createAction()
{
if (!isset($_POST['city_name'])) {
return json_encode(["error" => "city_name missing"]);
}
$city_name = strip_tags($_POST['city_name']);
$city_name = htmlentities($city_name);
$city_name = trim($city_name);
$city_id = CityModel::create($this->pdo, $city_name);
return json_encode(["message" => "Créé !", "city_id" => $city_id, "city_name" => $city_name]);
}