Optional Hash in puppet

Hi, I'm trying to create an optional hash variable in puppet but it gives me an error. What am I doing wrong here ? > define mym::usr_acct (> String $user = $title,> String $group,> Integer $uid,> Integer $gid,> String $home,> Optional[Hash[String, Integer]] $groups,> ){ It gives me below error saying it expects an integer. Error: Evaluation Error: Error while evaluating a Resource Statement, Mym::Usr_acct[websvc]: parameter 'groups' entry 'name' expects an Integer value, got String at /tmp/a.pp:1 on node centos.vm This is what I have in /tmp/a.pp > mym::usr_acct { websvc :> group => 'websvc',> uid => 4501,> gid => 507,> home => '/home/websvc',> groups => {> name => 'allok',> id => 9999, }, }