code: func RandomString(byteLength int) string {
  	b := make([]byte, byteLength)
  	_, err := io.ReadFull(RandReader, b)
  	if err != nil {
  		panic(fmt.Sprintf("Error reading random bytes: %s", err))
  	}
  	return base64.RawURLEncoding.EncodeToString(b)
  }
docs: // RandomString returns a randomly generated string of the requested length.