Delete Realm/Stitch User in Android SDK JAVA

I’m developing an android app in JAVA and I’m using Mongo Stitch to do the Login and Authentitfication for the users.
Now I want to have a functionality that deletes the authentifiacted user in my Stitch App, but I didn’t found any recourse how to do this.
I just know the manual deletion in the Browser ( as you can see in the screenshot). Can anyone help me out?

@Matthias_Linder I believe you will want to use the Realm Admin API for this -{groupid}/apps/{appid}/users/{uid}