Ansible, cloud init has completed successfully

cloud-init-success.yaml

- name: Ensuring that cloud init has complete.
  hosts: "Enter your hosts here"
  tasks:
    - stat:
        path: /var/lib/cloud/instance/boot-finished
      register: st

    - fail:
        msg: "/var/lib/cloud/instance/boot-finished does not exist; Cloud init has not complete"
      when: st.stat.exists == False

    - shell:
        cmd: >
          cat /var/lib/cloud/data/result.json | python -c "import sys,json; sys.exit(1) if json.loads(sys.stdin.read())['v1']['errors'] else sys.exit(0)"
      become: true