#manage-null-reference add missing import

Author: steinkel

src/Model/Behavior/SocialBehavior.php

@@ -16,6 +16,7 @@
 use Cake\Core\Configure;
 use Cake\Datasource\EntityInterface;
 use Cake\Event\EventDispatcherTrait;
+use Cake\Log\Log;
 use Cake\Utility\Hash;
 use CakeDC\Users\Exception\AccountNotActiveException;
 use CakeDC\Users\Exception\MissingEmailException;