Where are user environment variables stored?

Question

Windows

Hey!
Such a thing. I wanted to write a small utility to add a directory to the PATH variable. I found where variables are stored in the registry, but only system ones.

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Session Manager\Environment

,
and only the administrator can get access to them, I decided to look for where user variables are stored,
I found it here:

HKEY_USERS\S-1-5-21-341354423-1384976903-1200731615-1000\Environment

,
but as I understand the line

S-1-5-21-341354423-1384976903-1200731615-1000

is generated automatically, and if it is written in the code, then it will not work on another computer.
So here's how I can change (programmatically) the user's PATH variable. Preferably in the AutoIT language, but it's not critical...
Or how can you unambiguously define a user directory in the registry so that it works on any computer. After all, other programs do it somehow, for example, node.js during installation, or the pathed program ,
Or maybe there is some utility like pathed , but without dependencies ...?
UPD:
ATP everyone. Utility is ready)

Answer 1

HKCU\Environment than does not suit? this is just the user who is currently logged in

Answer 2

There is a SetEnvironmentVariable function that should change user variables. You don't need to know where they are stored.