In order to prevent charges to your account we recommend cleaning up the infrastructure that was created during this workshop. If you plan to keep things running so you can examine the workshop later, remember to do the cleanup when you are done.
Please note that you will need to manually delete some resources before you delete the CloudFormation stacks, so please do the following steps in order.
Disable termination protection for the applicable EC2 instances.
Delete the Cloudformation stack.
Make sure the Stack delete status is DELETE_COMPLETE, this could take a while.
Check if Amazon GuardDuty was disabled automatically or you need to disable it manually.
Disabling GuardDuty will remove its data.