matrix-docker-ansible-deploy/roles/matrix-bridge-appservice-slack/tasks/validate_config.yml

---

- name: Fail if required settings not defined
  fail:
    msg: >-
      You need to define a required configuration setting (`{{ item }}`).
  when: "vars[item] == ''"
  with_items:
    - "matrix_appservice_slack_control_room_id"
    - "matrix_appservice_slack_appservice_token"
    - "matrix_appservice_slack_homeserver_token"
    - "matrix_appservice_slack_id_token"