How to use the tabpy.tabpy_server.app.util.validate_cert function in tabpy

def assertValidateCertRaisesRuntimeError(self, expected_message, path):
        with self.assertRaises(RuntimeError) as err:
            validate_cert(path)
        self.assertEqual(err.exception.args[0], expected_message)

def test_valid_cert(self):
        path = os.path.join(self.resources_path, "valid.crt")
        validate_cert(path)

logger.critical(msg)
            raise RuntimeError(msg)

        self._validate_cert_key_state(
            "The parameter(s) {} must be set.",
            SettingsParameters.CertificateFile in self.settings,
            SettingsParameters.KeyFile in self.settings,
        )
        cert = self.settings[SettingsParameters.CertificateFile]

        self._validate_cert_key_state(
            "The parameter(s) {} must point to " "an existing file.",
            os.path.isfile(cert),
            os.path.isfile(self.settings[SettingsParameters.KeyFile]),
        )
        tabpy.tabpy_server.app.util.validate_cert(cert)