Google Sign In very slow

[deanAirre]

This is my first time implementing Google Sign in on React Native expo app, my question are:

1. I have succesfully run in on AVD and, allegedly, on device in the form of .apk. But it became very slow while it works as fine in AVD, what could be the cause of the slow? Is it firebase side or code side? Code snippet after second question
2. I found from many sources that they put keygen on /android/app folder, is this the usual way or is there better way so the files won't be deleted after npx expo prebuild command?