I have a yaml for the creation of a user.

 users:  
   username:  
    uid: 12345  
    gid: 6789  
    secggroups:  
         - group1  
         - group3  
    gecos: user_for_xyz  
    home: /home/username  

I also have a file with just the usernames called users_list. The playbook to create users is as follows:

---  
\- name: create users
  user: name="{{ item }}" uid={{ users[item]['uid'] }} group={{ users[item][gid] }} comment="{{ users[item]['gecos'] }}" home={{ users[item]['home' }} expires=0  
  with_items:  
    \- users_list  

How can I loop through the groups to be added to user?