code: public function getUser($owner = true)
      {
          if ($owner && $this->owner->getBehavior('Ownable') !== null && isset($this->owner->objectOwner)) {
              return $this->owner->objectOwner;
          } elseif (isset(Yii::$app->user) && isset(Yii::$app->user->identity->primaryKey)) {
              return Yii::$app->user->identity;
          }
  
          return false;
      }
docs: Get user.
  
  @param boolean $owner [[@doctodo param_description:owner]] [optional]
  
  @return [[@doctodo return_type:getUser]] [[@doctodo return_description:getUser]]