ring-auth-cli returns error
# Bug Report

### Describe the Bug

While requesting a token, the ring-auth-cli returns an error.

```
TypeError: Cannot use 'in' operator to search for 'error' in <html>
<head><title>406 Not Acceptable</title></head>
<body bgcolor="white">
<center><h1>406 Not Acceptable</h1></center>
<hr><center>nginx</center>
</body>
</html>
```

```
at RingRestClient.getAuth (/homebridge/node_modules/homebridge-ring/lib/api/rest-client.js:151:119)
at process.processTicksAndRejections (node:internal/process/task_queues:95:5)
```

### To Reproduce
Steps to reproduce the behavior:
 - Do an ring-auth-cli
 - enter mail + password