code: func tokenErrorf(s *corev1.Secret, format string, i ...interface{}) {
  	format = fmt.Sprintf("Bootstrap secret %s/%s matching bearer token ", s.Namespace, s.Name) + format
  	klog.V(3).Infof(format, i...)
  }
docs: // tokenErrorf prints a error message for a secret that has matched a bearer
  // token but fails to meet some other criteria.
  //
  //    tokenErrorf(secret, "has invalid value for key %s", key)
  //