gistfile1.pp

if has_key($params, 'unix_user') {
  $unix_user_real = str2bool($params['unix_user'])
  case $unix_user_real {
    false: {}
    default: {
      @account::user { $user_name:
        ensure    => present,
        shell     => $shell,
        uid       => $uid,
        group     => $group,
        comment   => $comment,
        purgekeys => true,
      }
    }
  }
}
else {
  @account::user { $user_name:
    ensure    => present,
    shell     => $shell,
    uid       => $uid,
    group     => $group,
    comment   => $comment,
    purgekeys => true,
  }
}