Update app.py

app.py

@@ -38,9 +38,10 @@ def get_leaderboard(dataset) -> dict:
             if responses_list:
                 first_response = responses_list[0]
                 if hasattr(first_response, "user_id"):
-                    contributions[record.id] = client.users(id=first_response.user_id).username
+                    unique_key = record.metadata.get("contribution_id", record.id)
+                    contributions[unique_key] = client.users(id=first_response.user_id).username
     return dict(Counter(contributions.values()))
-
+    
 
 def create_gauge_chart(progress):
     fig = go.Figure(