`joinroom` message (server)

A message confirming that a user has joined a room, sent in response to a joinroom message or a createroom message.

Format

(object):
- (integer) id: The id of this message.
- (string) command: Always "joinroom".
- (object) data:
  - (string) id: The id of the room that was joined.
  - (boolean) silent: Whether or not the join was silent (when the room is in superlobby mode)?