Update app.py

app.py

@@ -50,7 +50,7 @@ def api():
 
                     if quoted_msg_id:
                         fr = users.index(data.get("user_id"))
-                        to = users.index(quoted_msg_id)
+                        to = users.index(message_list.get(quoted_msg_id).get("user_id"))
                         matrix[fr][to] += data.get("amount")
 
                     if not quoted_msg_id and quoted_number == 0:  # 要平分的情況