long time trello user and I want to launch a course in trello and want to make sure that only paying customers can access the course board. is this possible? 1. I want only paying course memebers to see and edit the board. 2. what is the best way to do this, create the course on 1 board or create course in workspace? 3. how can i remove users who dont pay anymore. 4. Can i update the board course for paying customers to get the new content? how does this work? 5. anything else i need to know about course member access? thanks for your help