Copy SSH Keys to remote servers

copy.yml

---
- name: Copy SSH key
  hosts: all
  serial: "{{ serial|default(1) }}"

  tasks:
    - name: Get the name of the user running the script
      local_action: command whoami
      register: username_on_host
    - name: Copy ssh key to server
      authorized_key:
        user: "{{ username_on_host.stdout }}"
        key: "{{ lookup('file', '/Users/{{ username_on_host.stdout }}/.ssh/id_rsa.pub') }}"