I'd like to use Let's Encrypt certificates on the OC200. I already have the device responding on a domain that resolves internal to my network, but am getting HTTPS errors unless I update the certificate manually every month or so.

I'd like to let my PFSense firewall, which is already managing its own Let's Encrypt certificate via ACME also manage the certificate for the Omada controller. Once I have they key and certificate files, how can my firewall connect to the OC200 and provide them automatically? I wasn't able to find an API call for it here: https://use1-omada-northbound.tplinkcloud.com/doc.html