Log in with your iluminr credentials.
Click the Event Rooms tab.
Click the card of the event you wish to close.
Click the Close Event option, located under the map. A message will then appear, asking you to provide any comments on why the event is being closed and confirming you would like to close the event.
Type your comments into the comment box.
Click Yes, Close this event.
Congratulations, you have closed the event!