Bridge commercial use

I have a thermostat and a relay connected by bridge.
I tried to include provisioning to pass WIFI credentials and Auth Token to both devices but I couldn´t find the right code and libraries to include in my sketches.
I read all the links on Blynk website and comments about this, but no clear enough how to do it.
Any help with this is highly appreciated.

If you’re a commercial customer then you should be contacting for your support queries.