Change from NextAuth v4 syntax to v5 syntaxes

[JulianJorgensen]

Here's initial draft of pull request. Apologies for format issues.

[vercel]

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Name	Status	Preview	Comments	Updated (UTC)
next-intl-example-next-13	❌ Failed (Inspect)			Nov 3, 2023 3:22pm

[vercel]

@JulianJorgensen is attempting to deploy a commit to the next-intl Team on Vercel.

A member of the Team first needs to authorize it.

[amarincolas]

Apparently, this does not work anymore

const authMiddleware = auth(
  (req) => intlMiddleware(req),
  {
    callbacks: {
      authorized: ({token}) => token != null
    },
    pages: {
      signIn: '/login'
    }
  }
);

[DiegoGonzalezCruz]

I'm having issues with this... any ideas?

[alessandrojcm]

I got this working using this workaround. This is necessary due to a bug in next-auth itself. So this may need to be parked until that bug is resolved.