main.yml (tasks)

---
- hosts: all
  gather_facts: false
  sudo: true
  vars:
    users:
      user1:
        name: Full Name
        group: "group1"
      user2:
        name: Full Name
        group: "group2"
      user3:
        name: Full Name
        group: "group3"
  tasks:
    - name: Add all groups
      group:
        name: "{{item.value.group}}"
        state: "present"
      with_dict: users

    - name: Add all users
      user:
        name: "{{ item.key }}"
        group: "{{ item.value.group }}"
        comment: "{{ item.value.name }}"
        shell: "/bin/bash"
      with_dict: users
      register: addedusers

    - name: Update the password if the user was created
      user:
        name: "{{item.name}}"
        password: "superpassword!"
      with_items: addedusers.results
      when: item.changed