Added code example to getAuth nextjs documentation (created a partial)

[SarahSoutoul]

🔎 Previews:

• https://clerk.com/docs/pr/9966/references/nextjs/get-auth
• https://clerk.com/docs/pr/9966/references/nextjs/read-session-data

What does this solve?

This PR is in response to user's feedback requesting a code example on the getAuth() docs for Next.js. Here is the page for context: https://clerk.com/docs/references/nextjs/get-auth.

What changed?

• Created a new partial for this code example
• Included it in the Next.js getAuth() documentation + the Read session data page to fully utilize the partial

Checklist

• I have clicked on "Files changed" and performed a thorough self-review
• All existing checks pass

[github-actions]

Hey, here’s your docs preview: https://clerk.com/docs/pr/2295

[alexisintech]

perfection 😻 😻 is there anywhere else we could possibly use this partial?

[SarahSoutoul]

perfection 😻 😻 is there anywhere else we could possibly use this partial?

Had a look and doesn't seem like there are other places, where this partial could be used.

[alexisintech]

lgtm 😸💖

[vercel]

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Name	Status	Preview	Updated (UTC)
clerk-docs	✅ Ready (Inspect)	Visit Preview	Jun 17, 2025 4:05pm