Unable to find location of config.json on the raspberry pi


I’m running openHAB2 on a raspberry pi. I setup my own openHAB cloud instance using the following tutorial:

I then followed the below tutorial to enable notifcations using firebase:

Now following this a period of time elapsed and I switched the account email address that I was using with openhab cloud. Remote access still works fine however push notifications stopped working. I believe I need to update the jid and password in config.json

Now for the life of me I can’t find a config.json file or any file that enables me to update these configuration items. Is anyone able to point me in the right direction?