How to reuse initialData?

[IHIutch]

I've created a custom hook like the docs suggest here: https://swr.vercel.app/docs/getting-started#make-it-reusable. But since I'm using this with Next.js, I'm wondering how to correctly set up my custom hook so that initialData is also reused when I use my hook within components.

For example, something where I'm showing a user Avatar in a Nav component:

1. Fetch User data in getServerSide props, pass to page
2. Pass initial User data into hook from within the page function
3. Use hook/initialData in Nav component, but no initialData is passed in here