Forge domain_membership module -how do you use it?

[jmp242]

I'm probably being stupid, but all previous modules I've used create a new resource you can then use in your manifests. The example for this seems to be a class? So do I edit the init.pp it comes with to give domain details?
https://forge.puppetlabs.com/trlinkin/domain_membership/readme

If not, I don't see how doing

class { 'domain_membership':
  domain       => 'puppet.example',
  username     => 'joinmember',
  password     => 'sUp3r_s3cR3t!',
  join_options => '3',
}

isn't going to have a naming collision with the module that does the code? i.e. shouldn't it create a parameter rather than a class? Or something?