code: func NewShadow(username string) *Shadow {
  	loadConfig()
  
  	return &Shadow{
  		Name:    username,
  		changed: _ENABLE_AGING,
  		Min:     config.login.PASS_MIN_DAYS,
  		Max:     config.login.PASS_MAX_DAYS,
  		Warn:    config.login.PASS_WARN_AGE,
  	}
  }
docs: // NewShadow returns a structure Shadow with fields "Min", "Max" and "Warn"
  // got from the system configuration, and enabling the features of password aging.