Retrieve loaded certificates.

        :param filters: retrieve only matching certificates (optional)
        :type filters: dict
        :return: list of installed trap, drop and bypass policies
        :rtype: list

def list_certs(self, filters=None):
        """Retrieve loaded certificates.

        :param filters: retrieve only matching certificates (optional)
        :type filters: dict
        :return: list of installed trap, drop and bypass policies
        :rtype: list
        """
        _, cert_list = self.handler.streamed_request("list-certs",
                                                     "list-cert", filters)
        return cert_list