---
- hosts: new_instances
  tasks:
    - shell: whoami
      register: result

    - debug: var=result.stdout

    - name: become_root_user
      become: true
      become_user: root
      shell: whoami
      register: sudo_test_result

    - debug: var=sudo_test_result.stdout

    - name: creating_new_app_user
      become: yes
      become_user: root
      user: name=app_user
            password=Bzs310di86b6E
            groups="adm,sudo"
            system=yes
            state=present

    - name: adding_app_user_to_sudoers_list
      become: yes
      become_user: root
      lineinfile: "dest=/etc/sudoers state=present regexp='^app_user' line='app_user	ALL=(ALL:ALL) ALL'"

    - name: become_app_user
      become: true
      become_user: app_user
      shell: whoami
      register: app_user_test_result

    - debug: var=app_user_test_result.stdout