If you go to Edit > Project Settings > Android theres a section for Google Play, and it asks for your game app id. Whenever i paste it in theres a popup in the bottom right corner that says the app id is invalid. Ive been searching everywhere but i cant seem to find a way to fix this. Ive tried this in 4.23, 4.24, and 4.25, and it doesnt seem to work in any of them. Does anybody know how to fix this?