/**
* Finds user by [[username]]
*
* @return User|null
*/
protected function getUser()
{
if ($this->_user === null) {
$this->_user = Users::findByUsername($this->username);
}
return $this->_user;
}
private function findUser($model,$attribute){
$this->user = Users::findByUsername($model->$attribute , false);
return $this->user;
}