android - Show Google Play Games Welcome Dialog on all app launches - Stack Overflow

The best example of what I am trying to attempt can be described by the behavior of the simcity app (and I'm sure many others that I may be unaware of also using the google sign in for Google play

Introduction to Android Development - GeeksforGeeks

android - In-App Update API showing UPDATE_NOT_AVAILABLE while testing on debugging device - Stack Overflow

Introduction to Android Development - GeeksforGeeks

Guide to Install and Setup Visual Studio for Android App Development - GeeksforGeeks

Do I build for Android, too? - Quora

android - Google Play displaying my app version as Varies with device - Stack Overflow

Google Play In-App Review API: integration and experience, by David Vávra

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In-App Purchases with Flutter: A Comprehensive Step-by-Step tutorial, by M4trix Dev, Flutter Community