Get the data from the resource.

async def _async_get_data(self, resource, id=None):
        """Get the data from the resource."""
        if id:
            url = urljoin(self._api_url, "spc/{}/{}".format(resource, id))
        else:
            url = urljoin(self._api_url, "spc/{}".format(resource))
        data = await async_request(self._session.get, url)
        if not data:
            return False
        if id and isinstance(data['data'][resource], list):
            # for some reason the gateway returns an array with a single
            # element for areas but not for zones...
            return data['data'][resource][0]
        elif id:
            return data['data'][resource]

        return [item for item in data['data'][resource]]