This is an example of using KeystoneJS to provide authentication and session management for a NextJS app with SSR and client-side data fetching.
The NextJS API routes take in the sessionToken from incoming requests and pass it on to the KeystoneJS GraphQL server using the authorization: Bearer TOKEN pattern.
Data fetching for each API route is broken out into separate functions and exported so that they may be used by getServerSideProps and getStaticProps, as well.
This opens the KeystoneJS Access Control API for use with NextJS SSR. The client only needs to connect to the NextJS server and never directly to KeystoneJS.