code: func URL(service, name string) (string, error) {
  	proto, err := Proto(service, name)
  	if err != nil {
  		return "", err
  	}
  	host, err := Host(service, name)
  	if err != nil {
  		return "", err
  	}
  	port, err := Port(service, name)
  	if err != nil {
  		return "", err
  	}
  
  	rawURL := fmt.Sprintf("%s://%s:%s", proto, host, port)
  	u, err := url.Parse(rawURL)
  	if err != nil {
  		return "", errors.New(kayvee.FormatLog("discovery-go", kayvee.Error, "missing env var", logger.M{
  			"url":   rawURL,
  			"error": fmt.Errorf("Failed to parse URL: %s", err.Error()),
  		}))
  	}
  	return u.String(), nil
  }
docs: // URL finds the specified URL for a service based off of the service's name and which
  // interface you are accessing. Values are found in environment variables fitting the scheme:
  // SERVICE_{SERVICE NAME}_{INTERFACE NAME}_{PROTO,HOST,PORT}.