How to make a server side cross domain request in next.js?

Question

JavaScript

Hello.
I have an endpoint located on a different domain. From the locale, I want to make a request for the user to perform server authorization using getServerSideProps.
Of course, using native fetch and setting "credentials: 'include'", I don't get the desired result, but only "credentials were not provided". This is understandable, because everything is done on the server, and these settings are browser-based.
I can get cookies via request.headers.cookie (authorization, if anything, by session). But how do I make them go to another server is a mystery.
What to do? Or am I misunderstanding something? And what I want is unrealistic, and you need to write the session processing logic in the next itself.