[keycloak-user] Authentication & Registration from Android application

Hi all, In order to include keycloak in a android app, I'd like to know if somebody as a solution for this integration. We needs to handle authentication but also account creation from the android app (or ios). We use Ionic for the app to be available from web browser and native phone app. In the native app, authentication open a browser page from the native app but, as we could imagine, the authentication process is not able to go back to the native app... I know that it is possible to create a dedicated login page inside the app using the Direct Grant Access mechanism but I'd like to know if there is other solution (like an Intent but compatible with keycloak) ? Second and major problem for integration is that we'd like users to be able to start an account creation from the Android app directly. As I understand, only admin API allows to perform user creation so I imagine that I will have to create a dedicated 'proxy' webapp, acting as a keycloak admin and relying android app backend calls for real keycloak account creation... Is anybody have a more confortable solution avoiding developing such 'proxy' ? Thanks a lot for you support, best regards, Jerome.