ansible/roles/shell/tasks/users/znc.yml

---
- name: add group znc
  group:
    name: znc
    system: yes
    state: present

- name: Add the user znc
  user:
    name: znc
    system: yes
    shell: /bin/false
    groups: znc
    create_home: yes
    home: /var/lib/znc
    state: present