make_user.rb

def make_user(role, name, password)
  <some code that actually makes user>
end

class UserMaker
  def initialize(role)
    @role = role
  end
  
  def make(name, password)
    make_user(@role, name, password)
  end
end

make_admin = UserMaker.new("admin")
make_admin.make("adz", "pa$$word")