StartActivityForResult is an outdated method for doing this

snippets-android/auth/app/src/main/java/com/google/firebase/quickstart/auth/kotlin/GoogleSignInActivity.kt

Line 100 in 7268f81

startActivityForResult(signInIntent, RC_SIGN_IN)

It was misleading to some of my developers when they went from firebase docs to here and ended up using this for grabbing a result. It shows up as a deprecated library in android studio, and is considered the outdated way to do this. This likely needs to be updated.

Links for new way:
https://developer.android.com/training/basics/intents/result
https://stackoverflow.com/questions/62671106/onactivityresult-method-is-deprecated-what-is-the-alternative