If you’re running in your own account, make sure you run through these steps to make sure you don’t encounter unwanted costs.
Delete all manually created resources.
aws autoscaling delete-auto-scaling-group --auto-scaling-group-name ec2-workshop-asg --force-delete
aws ec2 delete-key-pair --key-name asgworkshop
Finally, delete the CloudFormation stack itself.
If you are at an AWS Event, please skip this step!
aws cloudformation delete-stack --stack-name $stack_name
aws cloudformation wait stack-delete-complete --stack-name $stack_name