Unsolved Credentials for Windows Service

[Agurtza]

Hi!!

I have an application in Qt that generates the Mykey key in the Windows registry at HKEY_CURRENT_USER\Software\MyCompany\MyApp\ to communicate with a Windows service. (I can't find a way to generate that key in another location)

On the other hand, I have a Windows Service(MSVS 2019 C#) that must read that same key, for which it is necessary to install it as User, log in with credentials.
If I set it as 'Local System Account' it tries to read the key from HKEY_USERS\Software\MyCompany\MyApp, and it doesn't exist there.

With the QTIFW I prepare the installation of the Qt Program and the Windows Service, but I have no way of knowing the password of the user's credentials.

Any ideas to do it? Or another possible solution?

Thank you