Who is outside new_checkout

The station Commandant needs the customers who are not taking part in the new_checkout experiment. Treat a customer as outside the experiment when the experiments object has no new_checkout key or when the experiments object itself is missing. What to return: - user_id — the customer ID - saved_by — the saved_by value from settings Keep in mind: - the experiment flag lives in settings under experiments, with new_checkout inside it - check only customers who have a settings document: settings is not SQL NULL Sort by user_id ascending.