Reset openSUSE password in windows 10 subsystem app

I lost my root/admin password for the suse subsystem of windows 10. How can I reset it?

There exist several guides for ubuntu. However, I saw only ubuntu specific.

I tried lxrun /setdefaultuser rootand got

Warning: lxrun.exe is only used to configure the legacy Windows Subsystem for Linux distribution.
Distributions can be installed by visiting the Windows Store:
https://aka.ms/wslstore

Error: 0x80070002