code: func ReadFromString(configString string) (*FileConfig, error) {
  	data, err := base64.StdEncoding.DecodeString(configString)
  	if err != nil {
  		return nil, trace.BadParameter(
  			"confiugraion should be base64 encoded: %v", err)
  	}
  	return ReadConfig(bytes.NewBuffer(data))
  }
docs: // ReadFromString reads values from base64 encoded byte string