/**
  * отображение формы логина и проверка данных
  */
 public function login()
 {
     if (isset($_SESSION['logged_user'])) {
         header('Location: /');
     }
     $errors = array();
     if ($_SERVER['REQUEST_METHOD'] == 'POST') {
         if (!isset($_POST['exampleInputEmail1']) || empty($_POST['exampleInputEmail1'])) {
             $errors['exampleInputEmail1'] = "This field is required";
         }
         if (!isset($_POST['exampleInputPassword1']) || empty($_POST['exampleInputPassword1'])) {
             $errors['exampleInputPassword1'] = "This field is required";
         }
         if (!$errors) {
             $usersModel = new UsersModel();
             $status = $usersModel->checUserExist($_POST);
             if ($status) {
                 $_SESSION['logged_user'] = $status;
                 addNotification('Welcome!');
                 header('Location: /');
             } else {
                 $errors['exampleInputEmail1'] = "Please verify you credentials";
             }
         }
     }
     include 'views/login.php';
 }