If you used an account provided by Event Engine, you do not need to do any cleanup. The account terminates when the event is over.
If you used your own account, please delete the cloudformation stack used to create lab resources. Follow these steps to delete CloudFormation Stack:
Stack Namethat has description
Amazon DocumentDB Labs Stackas shown in the screenshot below.
Deletebutton as shown in the screen below.
Delete Stackto confirm deleting. This process should take from 10-20 mins depending upon the resources that were deployed.
This wraps up the clean up process.