code: func NewDefaultConfig() *Config {
  	return &Config{
  		TTL:                env.GetOrDefaultInt("DESIGNATE_TTL", 10),
  		PropagationTimeout: env.GetOrDefaultSecond("DESIGNATE_PROPAGATION_TIMEOUT", 10*time.Minute),
  		PollingInterval:    env.GetOrDefaultSecond("DESIGNATE_POLLING_INTERVAL", 10*time.Second),
  	}
  }
docs: // NewDefaultConfig returns a default configuration for the DNSProvider