Missing idToken during Session Migration from v3 to v4

[KentoMoriwaki]

Checklist

• The issue can be reproduced in the nextjs-auth0 sample app (or N/A).
• I have looked into the Readme, Examples, and FAQ and have not found a suitable solution or answer.
• I have looked into the API documentation and have not found a suitable solution or answer.
• I have searched the issues and have not found a suitable solution or answer.
• I have searched the Auth0 Community forums and have not found a suitable solution or answer.
• I agree to the terms within the Auth0 Code of Conduct.

Description

When upgrading from nextjs-auth0 v3 to v4, I observed an issue where the idToken is not preserved during session migration. This causes unintended user logouts after upgrading.

The problematic code appears clearly at:
https://github.com/auth0/nextjs-auth0/blob/7bd83988caa15c89f3e7169e28dea4e820e9efc4/src/server/session/normalize-session.ts#L125C10-L131C14

Could you please clarify whether this omission is intentional? If this is not intentional, I'd be happy to submit a PR to address this issue.

Thank you!

Reproduction

• Start the application using nextjs-auth0 v3 and log in.
• Switch to a branch with v4 and upgrade the dependencies.
• Reload the application and observe that the idToken is no longer present in the session.

Additional context

No response

nextjs-auth0 version

4.6.0

Next.js version

15.2.4

Node.js version

v20.12.0

[frederikprijck]

Hey, not intentional. Happy to look at a PR to solve it if you prefer. Let me know if not, then I can address this.

[KentoMoriwaki]

@frederikprijck Thanks for your comment. I created a PR #2120

[tusharpandey13]

Thanks for the PR, it has been merged and will be released in the next minor release!