Hi, I'm running Prefect 1 and I'm a little lost on how to have a flow end if a given condition is met. For instance, I have a Flow performing an API call that returns rows updated in the last day, and if no rows are returned I'd like the flow to end right there. Typical python code like `exit`/`quit`/`pass` just cause the flow to "hang" in the cloud UI, but I'd like it to show a completed run.