FallbackSubscriptionProtocolHandler should preserver the session #137
Description
I am trying to use websocket for both subscriptions and query, using the DataFetchingEnvironment to get my user Principal by doing env.context.session.userPrincipal.
The ApolloSubscriptionProtocolHandler handle this in the createInvocationInput method, we should to this as well in the FallbackSubscriptionProtocolHandler so even if is not a subscription query the websocket session is available for authentication or any other use case related to the have the WSSession in the env.context