Finally, i think the Show External Login UI node doesn’t work at all.
This post Show External Login UI Node Continuously Fails Android - #6 by susinallday seems right, login is now handled differently.
So now, i see two ways possible:
- save data manually in a firebase database
- or use the Lootlocker plugin to connect to Google Play, and save data in Lootlocker storage
It is too bad unreal isn’t up to date with Google API, or at least that the documentation isn’t written has deprecated.