PE Puppet Console and manage multiple node user accounts - class

Question

I'm new to puppet and using Puppet Enterprise with the module from puppet for accounts. https://forge.puppet.com/puppetlabs/accounts
I'd like to be able to manage the user account details from the PE console for multiple users.
The best I can seem to get to is managing them within
/etc/puppetlabs/code/environments/production/manifests/site.pp
Which contains:
node default {
accounts::user { 'jeff':
comment => 'Jeff McCune',
groups => [
'wheel',
],
locked => true,
sshkeys => [
'ssh-rsa AAAA...',
'ssh-dss AAAA...',
],
password => '!!',
ensure => 'present',
}
accounts::user { 'dave':
comment => 'Dave Smith',
groups => [
'wheel',
],
locked => true,
sshkeys => [
'ssh-rsa AAAA...',
'ssh-dss AAAA...',
],
password => '!!',
ensure => 'present',
}
}
I'd ideally I'd like to be able to manage them per PE classification within the console. So each users details can be parameters I enter in the PE console - the number of users would vary, but just need the principle to able to add more than one.
I've tried adding into a manifest but struggled with declaring more than one account. I did that by:
/etc/puppetlabs/code/environments/production/modules/my_app/manifests/init.pp
which contained:
class my_app (
$username => '',
$usercomment => '',
$sshkey ='',
){
accounts::user { $username:
comment => $usercomment,
groups => [
'sudonopw',
],
locked => false,
sshkeys => [
$sshkey,
],
password => '!!',
ensure => present,
}
}
This allowed me to apply this class to any variation of my node classification and allow me to manage those parameters in the PE console. However I couldn't add more than one account to each node, as the class had been declared.
Can anyone give me some pointers.
Thanks