---
- hosts: webservers #modify your server list
  remote_user: root

  tasks:
  - include_vars: users.yml
  - name: Creating users to Jump Server
    user: name="{{ item.username}}"
    with_items: "{{ users }}"

  - name: Placing SSH Key to Authorized Key
  #please note that this code assumes as if the public-private key pair is generated, all public users (created above) have public keys copied at one place i.e. keyfiles directory for the ease
    authorized_key: user="{{item.username}}" key="{{ lookup('file', './keyfiles/authorized_keys.{{ item.username}}.pub')}}"
    with_items: "{{ users }}"