Use scope_ids.user_id instead of runtime.user_id

drag_and_drop_v2/drag_and_drop_v2.py

@@ -194,7 +194,7 @@ class DragAndDropBlock(XBlock):
                     pass
 
         self.runtime.publish(self, 'xblock.drag-and-drop-v2.item.dropped', {
-            'user_id': self.runtime.user_id,
+            'user_id': self.scope_ids.user_id,
             'item_id': item['id'],
             'location': attempt['zone'],
             'is_correct': is_correct,
@@ -224,7 +224,7 @@ class DragAndDropBlock(XBlock):
         except KeyError as e:
             return {'result': 'error', 'message': 'Missing event_type in JSON data'}
 
-        data['user_id'] = self.runtime.user_id
+        data['user_id'] = self.scope_ids.user_id
 
         self.runtime.publish(self, event_type, data)
         return {'result':'success'}