SSR: Accessing the user's loginToken on the server


I’m looking into getting rid of our dependency on fast-render, and it seems like one thing it does is set a cookie that contains the current user’s loginToken, because it’s not accessible on the server otherwise:

In the linked discussion, there’s a message from Emily Stark that states:

This is very cool! I’m really excited to see experimentation with
storing login tokens in cookies, because that’s something we’ll need to
figure out eventually for server-side rendering.

It doesn’t seem like there have been any further discussion since then, so I would love to know what the current state of things is. Is this a feature that’s on the roadmap, since enabling server-side rendering is pretty important? Any thoughts @benjamn?