How to pass the input params to federated subgraphs

[sm-the-explorer]

Hello Everyone,

want to get some help for solving below use case. I am referring to dgs federation to portray my use case.

In the below model shows query is taking input argument and part of Show data except reviews is being resolved by a shows-dgs subgraph.

type Query {
shows(titleFilter: String): [Show]
}

type Show @key(fields: "id") {
id: ID
title: String
releaseYear: Int
}

reviews which is part of Show is being resolved by a different subgraph reviews-dgs. Now I want to pass the filer titleFilter to reviews subgraph ? any suggestions in how I can do that ?

Example github url :- https://github.com/Netflix/dgs-federation-example

TIA