code: func (l *Log) bigQuery(ctx context.Context) (*bqapi.Service, error) {
  	tr, err := auth.GetRPCTransport(ctx, auth.AsSelf, auth.WithScopes(bqapi.BigqueryScope))
  	if err != nil {
  		return nil, err
  	}
  	return bqapi.New(&http.Client{Transport: tr})
  }
docs: // bigQuery constructs an instance of BigQuery API client with proper auth.