1: on load server sends all streams names to each user, on user creating stream server sends newly created stream name to each user [ "1", stream_names... ]
4: server send messages to user
6: server sends to user subscribed stream names to client [ "6", sybscribed_stream_names... ]
7: client to server: ask for stream messages [ "7", stream_name ]
8: server to client: reply to stream messages request [ "8", stream_name messages... ]
9: error: user does not exist [ "9", user_name ]
10: error: stream does not exist [ "10", stream_name ]
11: client to server: unsubscribe stream server to client: acknowledge client unsubscribing stream [ "11", stream_name ]