FTP login every second
Not sure if this is an issue, but I found that there is a successful login attempt to FTP server every second. Is this intended?

I'm using this setup:
* OS: Raspbian buster
* homebridge v1.0.4
* homebridge-camera-ui v2.1.9
* vsftpd 3.0.3-12

And the following config in homebridge:
```
"ftp": {
	"absolutePath": "PATH_TO_TOLDER",
	"active": true,
	"host": "IP",
	"interval": 120,
	"movementDuration": 20,
	"recordOnMovement": true,
	"recordVideoSize": 30,
	"username": "USERNAME",
	"password": "PASSWORD",
	"secure": false
}
```