Syntax - Puupet module foreman/manifests/init.pp

I am a newbie in Puppet. Prompt me, please.

Is somewhere manual or example how to correctly set admin_user, passwd and etc in init.pp file?

Thank in advance.

The foreman puppet modules are used by the installer to set up foreman. While it is possible to manually run them, it is highly recommended to use the installer which provides a nice wrapper around them with the ability to interactively configure your installation - Foreman :: Manual

Thank you for the answer.
I have installed the Foreman on clean node with Puppet 6