$ bundle exec rails console
>> user = User.find_by_display_name("My New User Name")
=> #[ ... ]
->> user.roles.create( {:role => "administrator", :granter_id => user.id}, :without_protection => true)
+>> user.roles.create(:role => "administrator", :granter_id => user.id)
=> #[ ... ]
->> user.roles.create( {:role => "moderator", :granter_id => user.id}, :without_protection => true)
+>> user.roles.create(:role => "moderator", :granter_id => user.id)
=> #[ ... ]
>> user.save!
=> true