Cannot overwrite session in Koa/next.js
I'm using koa, koa-session, koa-router and next.js.

When I auth, I initialize session here `ctx.session.subscriber = false`

I'm trying to update the session inside a route and share the new value across all routes (which is the aim of a session)

```
router.put('/api/test', async (ctx, next) => {
     ctx.session.subscriber = true;
     ctx.status = 200;
     ctx.body = {subscriber: true}
})
```

When I make a call to another route after edtiing session in "api/test", the session still has the initial value (ctx.session.subscriber is false again). We do not change the value elsewhere in the code.

Any idea on how to solve this ? Is it an issue with koa-session + next.js ?

Thank you for your help.

