1. try to create a user (can be admin)

Current state: the login field is disabled, with info "External user login can not be changed"

Expected state: the login field is enabled

It seems that @user.internal? is false for a new record
https://github.com/theforeman/foreman/blob/02d1635cbfca6e96d46b50d27232e152efb58d9f/app/views/users/_form.html.erb#L24