Singleton of stomp-client as parameter

[Cupkek05]

Hey guys,
I posted my issue there https://stackoverflow.com/questions/49303927/create-a-singleton-of-stomp-client-and-pass-it-as-parameter
If someone got a solution, feel free to answer me please.

I simply created a connection by
const client = new Stomp(config) ;
client.connect(function(sessionId, err)); and tried to pass it as parameter to a manager
for instance : const myManager = new MyManager(client);
And use it into myManager :

function MyManager(client){
client.subscribe();
}

But I got the error "Not connected" on MyManager side.

What I did wrong ?