public ActionResult Confirm(int id)
        {
            var meetingRep = new MeetingRepository();

            var meetingAccept = meetingRep.MeetingAccepts.FirstOrDefault(x => x.Id == id);

            var meeting = meetingRep.Meetings.FirstOrDefault(x => x.Id == meetingAccept.meetingId);

            if (meeting == null || meetingAccept == null)
            {
                throw new Exception();
            }
            meeting.checkPermissions(User.Identity.GetUserId());

            if (meeting.isOwner)
            {
                meeting.confirmer = meetingAccept.acceptorId;
                meetingRep.Update(meeting);

            }
            else
            {
                throw new Exception();
            }

                Notify.Confirm(meetingAccept);
            return PartialView();
        }
        public Response Confirm(int id)
        {
            var meetingRep = new MeetingRepository();

            var meetingAccept = meetingRep.MeetingAccepts.FirstOrDefault(x => x.Id == id);

            if (meetingAccept == null)
            {
                return new BadRequestError("No such accept");
            }
            var meeting = meetingRep.Meetings.FirstOrDefault(x => x.Id == meetingAccept.meetingId);

            if (meeting == null )
            {
                return new InternalError("No such meeting");
            }
            meeting.checkPermissions(GetUserId());

            if (meeting.isOwner)
            {
                meeting.confirmer = meetingAccept.acceptorId;
                meetingRep.Update(meeting);
            }
            else
            {
                return new UnauthorizedError("Not owner");
            }

            Notify.Confirm(meetingAccept);
            return Response(true);
            // todo: return
        }