I once had evohome set up nicely with Google home on my android phone, went through setting up all my rooms and assigning each TRV to the correct room.

At some point the connection has lost, every thermostat shows as disconnected and I can't use it. I keep putting off fixing it as IFTTT works well but the licensing is changing and anyway it niggles at me it's not working.

Can I simply go somewhere and reauthenticate against my evohome login? Or do I have to start over and set it all up from scratch?