system/tasks/usergroup.yml

---
- name: create system user
  become: true
  user:
    name: "{{ item.name }}"
    system: true
    home: "{{ item.home | default('/') }}"
    shell: "{{ item.shell |default('/usr/bin/nologin') }}"
  with_items: "{{ system_user }}"

- name: create system group
  group:
    name: "{{ item.name }}"
  with_items: "{{ system_group }}"
  become: true