How to return reactor.core.publisher.ParallelFlux in Graphql?

Question

I am trying to fetch users by user ids and my graphqls data is:

type Query {
  getUsersById(ids: [string!]: [User]
}

type User{
  name: String!
}

Assume the controller returns a response like below:

Not working code

@QueryMapping("getUsersById")
public ParallelFlux<User> getUserById(@Argument List<String> ids){
   return repository.getParallelFluxUsersInfo(ids); 
}

I am not expecting any workaround like return Flux only. I just wanted to check if we can return ParallelFlux as well or not. If yes, how to define the query? With above code, its throwing an error like below:

"Can't resolve value /getUsersById: type mismatch error, expected type List. DataFetchingException."

It works if I use Flux, like below.

Working code

 @QueryMapping("getUsersById")
 public Flux<User> getUserById(@Argument List<String> ids){
    return repository.getFluxUsersInfo(ids); //It works
 }