apollo-link-ws : Lazy or Connect after Login : Help

I am using GraphQL subscriptions for realtime data from server. I want to connect with GraphQL subscriptions after login only. How to do this? In 1.0 we can do this lazy option but in 2.0 there is no option. Please Help.

`const hasSubscriptionOperation = ({ query: { definitions } }) =>
definitions.some(
({ kind, operation }) => kind === 'OperationDefinition' && operation === 'subscription',
)

// using ApolloLink.split to select link for each operation.
const apolloLink = ApolloLink.split(
    hasSubscriptionOperation,
    webSocketLink,
    httpLink
);`