Squarespace Developer

I sell video classes though my squarespace site, which is no longer working due to the lack of functionality of memberships, clunky password pages only (no passwords for members). I Currently have 22 classes ( and growing ) and need a way to automate selling them for a limited viewing time where access to the classes automatically expire on said date. Perhaps membership sales also,. for this clients must have their own passwords ( not possible in squarespace). Will share website in chat.