# File provisioningapi.rb, line 462
                def add_member_to_group(email_address, group_id)
                        msg = RequestMessage.new
                        msg.about_member(email_address)
                        response  = request(:membership_add, group_id+'/member', @headers, msg.to_s)
                        member_entry = MemberEntry.new(response.elements["entry"])
                end