Add-ons [MMO] Centrifugo 2.3.4

• Add new option Channel Instance ID

Now the connection token is generated on all pages, if you want to override you can set your parameters in the constructor for the token, host and path.

• Added a check for subscribing to an existing channel.

• Fixed a bug in 2.3 where messages were not added to a thread when there were no pages (pagination).