How do you use the Schedules endpoint to get all schedules?
Per the documentation at https://help.alteryx.com/20214/server/schedules-endpoints it suggests that all parameters are optional. But when I actually try to formulate a request via the Swagger UI with all parameters optional, I get a 500 error.

Attempts to add parameters to see if perhaps the parameters aren't optional either result in an empty response [] or, confusingly, a message that the "RunsAfter" parameter needs to be later than the "RunsBefore" parameter... ?

If I shrug and just reverse the parameters, I get a 200 but empty response body:

What am I missing?