Allow the option to add a discount code for event registrations, without the need o create a new ticket type. Currently, I can select members, everyone, or registration code required - but I cannot combine those options. For example, I can't have a registration code required that is also members only. Additionally, the registration code option is still a fixed price. I would like the ability to create different ticket types, and then have the option of ADDING a discount code to those already created tickets, and have the ability to set a specific price for the discount code, or as a certain % off.