<?xml version='1.0' encoding='utf-8'?>
<OPCUAClient xmlns:xsd="http://www.w3.org/2001/XMLSchema">
  <AuthType>
    <x509 Certificate="my_cert.der" PrivateKey="my_private_key.pem">
      <Policy/>
      <Mode/>
    </x509>
  </AuthType>
</OPCUAClient>