if a gallery is accessible through a permanent URL without authentication, then it's basically a public gallery isn't it?

If there is no authentication, then search engines will find it. It will be like a public gallery.

How exactly do you want the gallery to "look different" for each user?

I'm confused. You seem to contradict yourself.
You say you want to show them "their album", but then you say don't want a link "per album"
Then you say you want to show "latest albums" so I don't understand the question.

Thank you for your answer, sorry not being clear, I'll try to explain what I have in mind.

You are right @nicolas.

What I would like is to have an "auto-login" for my users. This personal link would allow them to see the gallery as if they were logged-in, without the need to log in Everytime they visit the gallery.

When I create a new private album, I could allow certain user to see it. By using their link, they would see the new private without me sharing a new link. (This is what I mean by "the gallery would look different")

The use case is for people I often share album with.


Hope this help :)