# File lib/chef/expander/daemonizable.rb, line 70
      def set_user_and_group
        return nil if Expander.config.user.nil?

        if Expander.config.group.nil?
          log.info {"Changing user to #{Expander.config.user}"}
        else
          log.info {"Changing user to #{Expander.config.user} and group to #{Expander.config.group}"}
        end

        unless (set_group && set_user)
          log.error {"Unable to change user to #{Expander.config.user} - Are you root?"}
        end
      end