- name: get {{ user.username }} user info
  getent:
    database: passwd
    key: "{{ user.username }}"

- debug:
    var: getent_passwd

- name: create /chroots/{{ user.username }}/etc/passwd file
  file:
    path: /chroots/{{ user.username }}/etc/passwd
    line: "{{ getent_passwd | from_json }}"
    state: present
    create: yes
    owner: root
    group: root
    mode: '0644'

ok: [cf1] => {
    "getent_passwd": {
        "testuser1": [
            "x",
            "1001",
            "1002",
            "",
            "/home/testuser1",
            "/usr/sbin/nologin"
        ]
    }
}