I just sent you a new version to your gmail address. First, save your public and private keys from Automatic, and you just need to copy and paste the code from MyAutomaticServiceMgr. The rest of the code has not changed.
The reason for the exception is that your nickname (in the Automatic Mobile App) is not populated. I made the change today to use the model name instead and it works.
The new version is now available at my store.