2) For questions and support please use our Discord chat: https://discord.gg/C9aK28N or Stack Overflow: https://stackoverflow.com/questions/tagged/react-native-firebase
3) If this is a setup issue then please make sure you've correctly followed the setup guides, most setup issues such as 'duplicate dex files', 'default app has not been initialized' etc are all down to an incorrect setup as the guides haven't been correctly followed.
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