func (s *RoleService) DeleteUserRelationship(ctx context.Context, r *jsonapi.DataCollection) (*empty.Empty, error) {
    if len(r.Data) == 0 {
        return &empty.Empty{}, aphgrpc.HandleInsertArgError(ctx, fmt.Errorf("no id given"))
    }
    result, err := s.existsResource(r.Id)