# File lib/chef/provider/group/groupmod.rb, line 95
        def add_group_members(members)
          Chef::Log.debug("#{@new_resource} adding members #{members.join(', ')}") if !members.empty?
          members.each do |user|
            shell_out!("user mod -G #{@new_resource.group_name} #{user}")
          end
        end