Keys and credentials missing from advanced ansible lab

In the course “Ansible Advanced Course”
Under “Ansible Modules”
The final lab, “Project- Playbook” is missing the ssh keys. One might reasonably assume they should be there since we just did the key setup in the previous lab, and neither the requirements nor the solution indicate we need to start over and setup keys again.
It’s easy enough to overcome once you know the issue exists (assuming you remember the passwords from the previous lab), but I don’t think the issue is intended to exist.