Hi I'm following this tutorial with Umbraco 13 https://docs.umbraco.com/umbraco-commerce/v/10.commerce.latest/how-to-guides/limit-orderline-quantity I've copied and pasted the code but when i add a product to the cart this event never fires. What could i have missed? 2. Is it possible to have registered users to buy products? 3. In previous versions of Commerce there seems to be a Categories section. This is no longer available in the latest version. Has it been taken out?