Integrate with next-auth/authjs.dev v 5

[usrrname]

Tasks

• Add an endpoint that integrates with OAuthConfig<Profile>['userinfo'] for next-auth since it's only possible to get user info from /user/:userId currently

• Do something about post-sign in redirect in the demo repo

• Kill session on logout

• Create a provider profile for @curveball/a12n: DRAFT: next-auth provider profile next-auth#1

  • align on whether profile should be of oidc or oauth type (decision: oidc)
  • Create a test next-auth package and try it

• Add deployment guide; see what happens when trying to deploy to vercel

Implementation fixes:

• nonce is encoded as a JSON null instead of being omitted #590
• Workaround for bad authjs encoding of colons in secrets. #593
• Dev server should automatically generate a JWT RSA key #591
• Add a lot more info to the standard ID Token #595

[evert]

Yeah, a /userinfo endpoint would be great.