path to config.json and mqtt file

[JungeG]

Hello Arins!
probably I am sitting on my brain.

I have installed the volvooncall as you documented and can use the voc from the command line, but I have to add -u and -p - would prefer to put this in the config.json, but I am missing the info where to put config.json or how to call it. I put in the same directory as voc, but no success.
I am using the openhab2 mqtt server - also I find no informations how to configure this - is the info in the config.json sufficient to use it?
Could you please put it in your documents?

Thanks for clarification
Georg