Queries the Spark Cloud for detailed information about a device.

def _get_device_info(self, device_id):
        """Queries the Spark Cloud for detailed information about a device."""
        params = {'access_token': self.access_token}
        r = self.spark_api(device_id).GET(params=params, timeout=30)
        self._check_error(r)
        return r.json()