Desktop Client addon - how to access login credentials?

Dear all,
lately I installed on android NC DECK android app. It asked me which of already by NC android client used accounts i want to use and after another yes/no authorization question it was able to access my NC server without me having to enter my credentials again. That was awesome!

My question now:
is there an API or something that I can use in my self-created Windows App to access Nextcloud Desktop Client and get all configured accounts and connect with one of them without providing my credentials? I assume Nextcloud Desktop Client should ask in a popup if access to my App can be granted.
Thanks !

P.S.: I implemented Login flow v2 now, which works really smooth, but If i already have a local NC Desktop Client installed and probably with multiple accounts it could be of some help if I could access this already existing information.