5.4.1.1 ansible_user AnsibleUndefined for local connection

[Jurka007]

When running the playbook against localhost the 5.4.1.1 will fail as the ansible_user is not defined.

As a possible fix, default to empty string: ansible_user | default('') or to user running the playbook
ansible_user | default(ansible_env.USER)

[frederickw082922]

Good day @Jurka007 ! Thank for your Issue and PR! However, your PR #127 did not pass DCO. Kindly review.