def call(self, default_response=None, **query_params):
        """Perform a query to the Piwik server and return the response.

        :param default_response: Return value in case the query fails
        :param query_params: Dictionary with the parameters of the query
        """
        query_url = self.get_query_url(**query_params)
        return self._perform_call(query_url, default_response)
Perform a query to the Piwik server and return the response.

        :param default_response: Return value in case the query fails
        :param query_params: Dictionary with the parameters of the query