I'm trying to create a card button that will add all members on my board to a card when used, but I don't see any variable for {boardmemberusernames} or similar. Everything I can find is for card members or the member performing the action.
I tried using a wildcard variable and it didn't work. The only other way I can think to do it is with a brute-force method: to add lots of actions to the button to add each board member one at a time, which seems very inefficient.
Am I missing anything? Is there a way that a board member variable could be easily added if it doesn't already exist?