Скачать или смотреть How to Implement Admin Login in a Flutter App Using Firebase Authentication

Learn how to create a seamless login experience in your Flutter app for both regular users and admins using `Firebase Authentication`. This guide provides code examples and best practices to ensure proper user routing.
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How to Implement Admin Login in a Flutter App Using Firebase Authentication

In today's guide, we will explore how to build a login feature in your Flutter app that differentiates between regular users and admin users. Using Firebase Authentication, we can easily manage user sign-ins using email and password. This guide will walk you through the setup and provide essential code snippets to achieve this functionality.

The Challenge

You need to create a login mechanism such that:

A regular user can log in with their email and password to access their user screens.

An admin user can log in with a specific set of credentials to navigate to a designated admin page.

If a user is logging in for the first time and has no corresponding data in Firestore, they should be prompted to fill in their information.

Solution Breakdown

Step 1: Setting up Firebase Authentication

Before we dive into the code, ensure that you have the following dependencies in your pubspec.yaml file:

[[See Video to Reveal this Text or Code Snippet]]

Replace X.X.X with the latest version numbers.

Step 2: Initialize Firebase in Your App

In your main application file, you need to initialize Firebase. You can do this in the main() function as follows:

[[See Video to Reveal this Text or Code Snippet]]

Step 3: Implementing Sign-In Logic

Here is the core logic for signing in users with email and password, followed by the navigation rules based on user roles.

Sign-In Method

The method to sign in with an email and password looks like this:

[[See Video to Reveal this Text or Code Snippet]]

Login Functionality on UI

Now, you can implement the login functionality within your UI, like so:

[[See Video to Reveal this Text or Code Snippet]]

Important Note

One notable adjustment is the order of fetching the firebaseUser. You should fetch the firebaseUser after the sign-in operation has successfully completed. This ensures you are checking the correct user identity.

Conclusion

By following these steps, you will have a functioning login system that efficiently redirects users based on their roles. Remember to maintain a clear structure in your code and handle exceptions appropriately to enhance the app's user experience. Happy coding!