It is kinda building problem too.
Soo recently in my game Left Behind I’ve been working on a PvP, and I need to separate customizing from the PvP, but I have no idea how to use communication service 
so I was searching for it in resources and I have found it.
But… It has full customization… And I still don’t know how to use/configure it.
Could you explain what you mean by “communication service”? Seems like you’re asking about a very specific resource, which in that case you should try asking the resource’s maintainer(s) first. If that’s not an option, including a direct upload or link of the resource would help.
Thanks, but it isn’t what I am looking for, I need to send data between servers