code: func (r *Room) Entry(ctx context.Context) (*protos.Response, error) {
  	fakeUID := uuid.New().String() // just use s.ID as uid !!!
  	s := pitaya.GetSessionFromCtx(ctx)
  	err := s.Bind(ctx, fakeUID) // binding session uid
  	if err != nil {
  		return nil, pitaya.Error(err, "ENT-000")
  	}
  	return reply(200, "ok"), nil
  }
docs: // Entry is the entrypoint