Getting undefined refreshToken with ring-auth-cli
Today I realized that i needed to update my code for the new refreshToken expiring so quick. First thing i did was request a new refreshToken via the command line, and i obtained this:

```This CLI will provide you with a refresh token which you can use to configure ring-client-api and homebridge-ring.
Email: xxxxxxx@gmail.com
Password: xxxxxxx
Ring 2fa or verification code is enabled.  Please enter code from the text/email.
2fa Code: xxxxxx
Successfully logged in to Ring. Please add the following to your config:

"refreshToken": "undefined"
```

I tried to put wrong credentials and wrong 2fa code just to check if somehow a authentication error was "swallowed", but i get the expected errors from the cli. I guess that something have changed on their side again, but no clue where start looking. 

Can someone help with this? I would be happy to help if someone can point me where's the code for getAuthWith2fa.

Thank you

