Router prompt playbook not working

gistfile1.txt

---
- name: Test Prompt
  hosts: pynet-rtr1
  vars:
    creds:
      host: "{{ ansible_host }}"
      username: "{{ username }}"
      password: "{{ password }}"

  tasks:
    - ios_facts:
        provider: "{{ creds }}"
      tags: facts_only

    - ios_command:
        provider: "{{ creds }}"
        commands: 
          - command: 'clear counters fastethernet1'
            prompt: 'Clear "show interface" counters on this interface [confirm]'
            answer: c