 could not connect to dynv6 api

Any Idea why doesn't work?
```
./hook.sh
Hook ERROR: could not connect to dynv6 api. returned http status code: 400
```

That being said, the request works fine:
```
curl \
> -H "Authorization: my_token" \
> -H "Accept: application / json" \
> https://dynv6.com/api/v2/zones
```