CakePHP 3 - record can not be saved in my login function - cakephp

Question

Record can not be saved in my login function. I don't know why.
Does anyone know what the problem is?
Other functions in the controller (add, edit, delete) work without problems.
...
class UsersController extends AppController
{
...
/**
* Login method
*/
public function login()
{
if ($this->request->is('post')) {
$user = $this->Auth->identify();
if ($user) {
$this->Auth->setUser($user);
$user = $this->Users->newEntity($user,['validate' => false]);
$user->isNew(false);
//Last login date
$user->test = 'abcdef';
$user->modified = new Time();
$this->Users->save($user);
return $this->redirect($this->Auth->redirectUrl());
}
$this->Flash->error(__('Error'));
}
}
...
}

Answer 1

Why you use newEntity ?
Try to remove it and do something liek this :
$this->Auth->setUser($user);
$user->isNew(false);
$user->validate=false;
//Last login date
$user->test = 'abcdef';
$user->modified = new Time();
$this->Users->save($user);
If it doesn't work try to show entity errors to know why :
Before : $this->Users->save($user);
Do that :
debug($user->errors());
die();

Answer 2

It works on this way:
public function login()
{
if ($this->request->is('post')) {
$authUser = $this->Auth->identify();
if ($authUser) {
$this->Auth->setUser($authUser);
$User = $this->Users->get($authUser['id']);
//Last login date
$User->modified = new Time();
$this->Users->save($User);
return $this->redirect($this->Auth->redirectUrl());
}
$this->Flash->error(__('Error'));
}
}