matrix-docker-ansible-deploy/roles/matrix-bridge-mx-puppet-twitter/tasks/validate_config.yml

---

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