I'm still trying to wrap my head around ansible in general and I guess I
just don't understand its structure fully yet.  The very first thing I'm
attempting to do is to create some user accounts across a group of servers.
 We have a handful of sysadmins who manage a group of servers, so I figured
I could so something along these lines to define how we want an account
created:

  tasks:
     -name: Add user ${username}
     action: command /bin/echo ${username}
    - name: Add/remove user ${username}
      action: user name=${username}
              comment="${fullname}"
              uid=${uid}
              group=wheel
              shell=/bin/bash
              createhome=yes
              state=present

    - name: Add ssh key for ${username}
      action: authorized_key user=${username}
key="$FILE(/ansible/conf/users/files/ssh-key.${username})"

    - name: Add user ${username} to nagios group on the util server only
      action: user name=${username}
              groups=nagios
      only_if: "'$facter_hostname'== 'util'"

But then for the life of me I can't figure out how to apply this playbook
for each of the sets of username/fullname/uid that I need to create
accounts for.  Is this a good way of doing this sort of thing or am I
completely missing the boat?

-Bruce