Can I pass a custom redirect link to my static login page?

[s-christian]

I'm new to GitHub and web development in general, so please bear with me if I make trivial mistakes.

I currently have an express backend that uses an auth middleware on protected routes to redirect users to my login page if no JWT cookie is detected.
If possible, after successful login, I would like to redirect the user back to the page that requested the login (profile page, no token -> login, receive token -> back to profile page). However, I can not think of any way to do this without using SSR in order to read either custom headers or query strings.

I'd rather not regenerate the HTML on every request to my login page. Is there any way to accomplish this? For example, can I pass the API response as props to my static login component?

[s-christian]

Not sure why I was having trouble before, but I've figured it out now.

Server Auth Express middleware:

// ...
if (!req.cookies.token) res.redirect(`/login?redirect=${req.url}`);
// ...

Login:

import Router from "next/router";
// ...
function handleSubmit(event) {
    event.preventDefault();
    axios
        .post("/login", { ... })
        .then((response) => {
            // ...
            window.location.href = Router.query.redirect
                ? Router.query.redirect
                : `/users/${response.data.user.username}`;
// ...