public function login_validate($array = array())
 {
     require_once 'model/Model.php';
     $model = new Model();
     $username = trim($array['username']);
     $password = trim($array['password']);
     if (empty($username) && empty($password)) {
         $array['message'] = "Please enter your Username and Password";
         return $array;
     }
     if (!empty($username) && !empty($password)) {
         $data = $model->model_login_validate($array);
         $cnt = $data['cnt'];
         $user_id = $data['user_id'];
         if ($cnt > 0) {
             $_SESSION['login'] = 1;
             $_SESSION['user_id'] = $user_id;
             $this->home();
         } else {
             $array['message'] = "Please verify your Username and Password";
             return $array;
         }
     }
 }