code: func FlushMACCommandQueue(p *redis.Pool, devEUI lorawan.EUI64) error {
  	c := p.Get()
  	defer c.Close()
  
  	key := fmt.Sprintf(macCommandQueueTempl, devEUI)
  	_, err := redis.Int(c.Do("DEL", key))
  	if err != nil {
  		return errors.Wrap(err, "flush mac-command queue error")
  	}
  	return nil
  }
docs: // FlushMACCommandQueue flushes the mac-command queue for the given DevEUI.