Summary 

As we continue to explore the Firebase toolchain, Authentication turned out to be the biggest chapter. It is a practical chapter; we have seen how to work with different auth providers and we have experience in using the FirebaseUI library. We have explored how to create an account using an email address, phone number, Google, Facebook, and Twitter. We have learned to fetch the API key for different providers, and we also learned how to retrieve the SHA-1 fingerprint inside Android Studio. All the code snippets that we have seen in this chapter are Android community recommended code. We have extensively used the Firebase SDK and FirebaseUI to build most of the authentication use cases. Customizing the email address, we have also understood the Firebase console, managing users, and so on. Overall social networking and phone number login, anonymous login and linking...