fix sample code

app.py

@@ -234,8 +234,8 @@ def open_prs(profile: gr.OAuthProfile | None, user_or_org: str = None):
     username = profile.preferred_username
     user_to_receive_prs = user_or_org or username
     data = get_data_for_user(user_to_receive_prs)
-    if user_or_org:
-        random.sample(data, min(5, len(data)))
+    if user_or_org is not None:
+        data = random.sample(data, min(5, len(data)))
     if not data:
         return "No PRs to open"
     results = []
@@ -244,7 +244,6 @@ def open_prs(profile: gr.OAuthProfile | None, user_or_org: str = None):
             results.append(
                 update_metadata(metadata_payload, user_making_request=username)
             )
-
         except Exception as e:
             logger.error(e)
     return f"Opened {len([r for r in results if r['opened_pr']])} PRs"