How to Connect Spring Boot GraphQL server with NextJS UI using code generator

[gimtwi]

Hello, I'm normally using GraphQL code generator with node.js GraphQL apollo server in Next.js apollo client ui. Now I'm trying to do the same with GraphQL Spring Boot server. I build Spring Boot GraphQL server and can access it on http://localhost:8080/graphiql
How do I approach UI side configuration? Witch plugins should I use? If anyone has some examples with these settings, place share.
I tried to generate from the server with usual configuration, but get "Failed to load schema ..." error.