New to SSR/node.js and redux toolkit.

I am trying to figure out how to set the initial state of the store on the client side with the store coming from server side.

The store is a user session (name, email, etc.) that is being injected via window object. I can verify that it is being passed to the client because previously it has been using just redux. Looking to take full advantage and wanted to convert to redux-toolkit.

Wondering if preloadedState is the way to go here?

const initialState = window.redux_store;

export const store = configureStore({
  reducer: {},
  preloadedSate: initialState
});

Or am I missing something?

TIA!