Button "Whatsapp" on the site. Got a solution?

Question

API

Greetings!
There are a lot of threads on the toaster about this - an example . there is no solution for all these years, so that it would be possible to connect the user on the site with the manager without any problems.
Just yesterday, I updated WatsUp to the latest version of android 2.16.310, this version has the "Invite to group by link" function. You can find it by clicking the "Add user to group" button.
Thoughts:
If I create a group in WhatsUp and post it on the site, all users will be in the same group. Accordingly, it is fraught with a complete mess and a mass attack by the manager from all members of the group.
Question:
What can be done in this regard? Only one solution comes to mind, create 500 groups (I don’t know how whatsUp will react to this)links to keep on the site, when you click on the "Chat" button by one guest on the site - delete it and substitute a new one, thus each user will fall into the "single group".
I consider the disadvantage of extra manual work in registering groups and adding them to the site and the possibility of blocking from the outside.
Perhaps there is a more correct solution, I think you understand my problem.

Answer 1

Have n't used it myself, but
https://github.com/mgp25/Chat-API/wiki/WhatsAPI-Do...

Answer 2

mgp25/Chat-API
End of support End of support
#2116 opened on 10 Aug 2016 by mgp25
and says
[status] => fail
[reason] => old_version
when registering. I tried to change the version of whatsapp in constants - it doesn’t help, maybe I didn’t have enough patience, tell me if anyone figured it out?
Or - Is there an up-to-date PHP library to work with whatsapp?