- hosts: localhost
   connection: local
   gather_facts: no
   vars:
     users:
     - foo
     - bar
     - bam
   tasks:
   - debug: msg="item.0={{ item[0] }} item.1={{ item[1] }}"
     with_nested:
     - users
     - [ 'clientdb', 'employeedb', 'providerdb' ]