Shelly Dimmer Gen 3 driver?

I have lots of Shelly Dimmer 2's setup in Hubitat, for example

One recently died so I've replaced it with the new model, Shelly Dimmer Gen 3. I would have thought just switching the IP address in the Hubitat device to the new IP address would have worked but I get various errors. With no authentication on the Dimmer module I get this error

One of the issue I see with the existing driver is that for authentication the Shelly Dimmer 3 now just requires a password, no username. If I leave username blank and set the password in the driver I get this error

Has anyone successfully got the Dimmer 3 working with Hubitat?