As seen elsewhere, a "short" module name is being used when students are told they should be using FQCNs. It appears in two lines, here:
The line is this:
"{{ lookup('file', 'files/'+ item['username'] + '.key.pub') }}"
To keep it consistent with what students are being told, it should be this:
"{{ lookup('ansible.builtin.file', 'files/'+ item['username'] + '.key.pub') }}"
Incidentally, the correct way is shown in section 9.3:
While it is neat that a function and plug-in can retrive the required string from the file (especially since the SSH key can be long), it is a technique that is not taught during the course of this RH294 (if I recall, plug-ins and filters were part of the 8.0 version) - it is only introduced in this guided lab, so students may be caught off-guard.
