Hi there 👋, I want to ask about this case for Netlify Proxies:

1. I have my main app deployed at authjs-with-proxy.netlify.app/
2. I have my Auth app deployed at https://next-auth-behind-cdn.vercel.app/authjs/ (with custom basePath and trailing slash)
3. I proxy my /authjs in the main app to the Auth app in the _redirects file: /authjs/* https://next-auth-behind-cdn.vercel.app/authjs/:splat 200!
4. I log in at authjs-with-proxy.netlify.app/authjs
5. I got navigated back to authjs-with-proxy.netlify.app/authjs . On the address bar, the query params code and state are still shown, while I expect it to not shown
   image

This is not happening in a normal Auth app, where the query parameters got stripped down after the OAuth callback.

I'm currently removing the query params by using the Next.js router like this:

 const router = useRouter();
 if (router.query.code && router.query.state) router.replace('/', undefined, { shallow: true });

but I feel this can be achieved using either Netlify rewrites or Next.js rewrites. I've tried:
_redirects file

/authjs/?code=:code&state=:state /authjs/ 200
/authjs/?state=:state&code=:code /authjs/ 200

or in my Auth app's next.config.js:

const isProd = process.env.NODE_ENV === 'production'
module.exports = {
 trailingSlash: true,
 assetPrefix: isProd ? process.env.NEXT_PUBLIC_ASSET_PREFIX : undefined,
 basePath: process.env.NEXT_PUBLIC_ASSET_PREFIX,
 async rewrites() {
 return [
 {
 source: '/',
 has: [
 {
 type: 'query',
 key: 'state',
 },
 {
 type: 'query',
 key: 'code',
 },
 ],
 destination: '/',
 },
 ];
 },
}

None of the above works for me, so I would really appreciate any help here 🙏 Thanks for reading!
Repos:

• https://github.com/nextauthjs/next-auth-behind-cdn
• https://github.com/nextauthjs/auth-with-proxy