Should I use Firebase authentication?

Firebase Authentication aims to make building secure authentication systems easy, while improving the sign-in and onboarding experience for end users . It provides an end-to-end identity solution, supporting email and password accounts, phone auth, and Google, Twitter, Facebook, and GitHub login, and more.

Implementing Firebase Authentication in a Flutter app

Follow the steps to Firebase email and password authentication in the Flutter application.

To sign a user into your app, you first get authentication credentials from the user. These credentials can be the user’s email address and password, or an OAuth token from a federated identity provider. Then, you pass these credentials to the Firebase Authentication SDK.