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

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

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