Registration fails

Hi, thanks for creating that tool, I am hoping this will work as soon Desktop app will be deprecated

The registration fails for me, how can I help with debugging it ? I anomized my data.

```
$ authy-cli register XX ZZZZZZZZZ
2024/03/14 13:04:54 Checking status of account XX-ZZZZZZZZZ
2024/03/14 13:04:55 Account ID is 0
2024/03/14 13:04:55 Device registration request sent to other devices via
2024/03/14 13:04:55 Please accept this request.
2024/03/14 13:04:55 error: json: cannot unmarshal string into Go struct field RegistrationStatus.message of type struct { RequestStatus string "json:\"request_status\"" }
2024/03/14 13:04:55 Writing all HTTP requests to 2024-03-14T13:04:54.har
2024/03/14 13:04:55 !!! THIS HAR MAY CONTAIN SENSITIVE INFORMATION !!!
```

I am not sure what to share but this is what I got from .har
```
$ cat 2024-03-14T13\:04\:54.har |jq |grep statusText
"statusText": "406 Not Acceptable",
"statusText": "404 Not Found",
"statusText": "406 Not Acceptable",
```