xoxys.users/tasks/users_keys.yml

---
- name: Set authorized_key for ssh users
  ansible.posix.authorized_key:
    user: "{{ item.name }}"
    key: "{{ item.sshkeys }}"
    exclusive: True
    state: present
  loop: "{{ users_default_users }}"
  loop_control:
    label: "{{ item.name }}"
  when: item.sshkeys is defined