That could be done after the user enters both the email/username and password

Edit: sorry, I think I misunderstood what you said, but if someone is using something like “sign in with google”, we’ve had separate buttons for that for ages.

I already have a constant ip on the vpn I still don’t get it, sorry

How would I use that in this situation? I don’t get it. I already have a vpn set up to communicate between the two devices, and have been successfully running multiple services in this configuration for about a month. It’s just XMPP that I’m having trouble with.

The vps communicates with the rpi through a vpn.

I have not heard of duck dns nor lstio, but I’ll check it out when I get home.

I use a self-hosted vpn, because I don’t want to expose anything to the internet. The ones I do want to, I haven’t set up yet since it would require reinstalling my pi. But I do have a reverse proxy set up on a vps that I will use once I get around to doing it.

Nextcloud notes is really nice.