(Please write your issue here along with the environment details below. Include any key files which will help us to debug, such as your `Podfile` and/or `app/build.gradle` file).

### Environment

1. Target Platform (e.g. iOS, Android):
2. Development Operating System (e.g. macOS Sierra, Windows 10):
3. Build tools (Xcode or Android Studio version, iOS or Android SDK version, if relevant):
4. React Native version (e.g. 0.45.1):
5. RNFirebase Version (e.g. 2.0.2):