How to replace FEU events OnCreateUser / OnCreateGroup with hooks

[noosphere]

Hello (and happy new year)!

I'm updating to CMSMS 2.x an old website that executed quite a few interesting actions (UDTs) to sync the FEU and the Uploads modules when a FEU user or group was created (events: OnCreateUser / OnCreateGroup).
Now I just noticed the new version of FEU does not use events anymore, but hooks.

I have a limited knowledge of php and would really appreciate if any expert programmer could give me some hints and tips.

Thank you in advance!

[noosphere]

Temporarily I downgraded to the last FEU 2.14.3.4 that used Events