I set up payments for an upcoming class that I am teaching, but for some reason CK doesn't send me notifications when payments are made or sign ups happen. Is there a way to turn this on? I really thought for a moment that no one had signed up for my course. It was only when a deposit was made to my account that I found out that people really had signed up. I was surprised because every other platform - Thinkific, Squarespace, Acuity, Calendly have a notification system for this that you can turn off or on as needed. Is there something on the backend that I am missing?