Apollo-link: Cannot identify subscription users once the WebSocketLink has been configured.

I'm having trouble identifying users who have connected with web sockets. Here is how you can reproduce this issue:

1) Create a new client and configure a WebSocketLink with connectionParams.

    const wsLink = new WebSocketLink({ 
      uri: `ws://localhost:3333`, 
      options: { 
        connectionParams: {
          lazy: true,
          authToken: localStorage.getItem('token')
        }
      } 
    });

At this point the user has not logged in, there is no token. The websocket also has not yet connected, because lazy is set to true. It doesn't connect until until the first subscription has been sent, after the user has logged in.

When the user does log in, and the connection has been made, the authToken is null because this value was set when the client was configured, not after the user has logged in.

    subscriptionServer.onConnect = params => {
      console.log('connected: ', params.authToken) // null
    }

Queries and Mutations are authorized by concatenating links:

const httpLink = new HttpLink({ uri: GRAPHQL_ENDPOINT })
const authLink = new ApolloLink((operation, forward) => {
    const token = localStorage.getItem('token')
    if (token) {
        operation.setContext({
            headers: {
                authorization: `bearer ${token}`
            }
        })
    }
    return forward(operation)
})

const httpAuthLink = authLink.concat(httpLink)

I can identify users this way because the token is added to the authorization header when the request has been sent after the user has logged in. The problem with the WebSocketLink connection params is that it reads the token when the client is being configured before the user has logged in.