App.kt

class App : Application() {
  override fun onCreate() { 
    super.onCreate()
    val devOptions = FirebaseOptions.Builder()
              .setProjectId("beserved-development-project")
              .setApplicationId("1:212877806437:android:fee5f52927e2f7a907ed8c")
              .setApiKey("AIzaSyADUe90ULnQDuGShD9W23RDP0xmeDc6Mvw")
              .build()
    val prodOptions = FirebaseOptions.Builder()
              .setProjectId("beserved-production-project")
              .setApplicationId("1:27992087142:android:ce3b6448250083d1")
              .setApiKey("BIzaSyADUe90ULnQDuGShD9W23RDP0xmeDc6Mvw")
              .build()
  
    // here we check wich instance to use depending on the build type 
    if(BuildConfig.DEBUG) {
        FirebaseApp.initializeApp(this, devOptions, "beserved-development")
    } else {
        FirebaseApp.initializeApp(this, prodOptions, "beserved-production")
    }
  }
}