matrix-docker-ansible-deploy/roles/matrix-coturn/tasks/validate_config.yml

---

- name: Fail if required Coturn settings not defined
  ansible.builtin.fail:
    msg: >-
      You need to define a required configuration setting (`{{ item }}`) for using Coturn.      
  when: "vars[item] == ''"
  with_items:
    - "matrix_coturn_turn_static_auth_secret"