protobuf.Timestamp.</p></td></tr></tbody></table></section><h2 id=Tls>Tls</h2><section><p>Tls let operator specify client authentication setting when TLS is used for
connection to the backend.</p><table class=message-fields><thead><tr><th>Field</th><th>Type</th><th>Description</th></tr></thead><tbody><tr id=Tls-ca_certificates><td><code>caCertificates</code></td><td><code>string</code></td><td><p>The path to the file holding additional CA certificates to well known
public certs.</p></td></tr><tr id=Tls-toke