Flutter app

Open utils/Constants.dart, replace your data

googleMapAPIKey
mOneSignalAppId
mOneSignalRestKey
mOneSignalChannelID (optional)
DOMAIN_URL (optional)

Open \android\app\src\main\AndroidManifest.xml, replace your key

  <meta-data android:name="com.google.android.geo.API_KEY"
               android:value="YOUR KEY"/>

Setup Firebase project, download google-services.json and copy to \android\app