How to implement a custom email verification system in FlutterFlow?

 

Implementing a Custom Email Verification System in FlutterFlow

 

Creating a custom email verification system in FlutterFlow involves leveraging backend integrations and some custom logic to effectively manage user registrations. The steps outlined below provide a detailed process to accomplish this task.

 

Prerequisites

 

• Access to a FlutterFlow account with a project set up.
• A good understanding of basic FlutterFlow functionalities and Firebase backend services.
• Familiarity with writing custom actions using Dart within FlutterFlow.

 

Setting Up Firebase Authentication

 

• Log in to your Firebase console and create a new project if you don’t have one.
• Navigate to the Authentication section and enable Email/Password sign-in method.
• In your FlutterFlow project, integrate Firebase by navigating to the Settings > Authentication section and following the setup instructions.
• Ensure Firebase is properly connected by checking the Firebase Setup page in FlutterFlow.

 

Designing the Email Verification Flow

 

• Create the necessary user interface elements in FlutterFlow, such as the sign-up page and email verification page.
• Utilize the widget tree to add text fields for a user to enter their email and password, and buttons for submitting these credentials.

 

Implementing the Email Sign-Up Logic

 

• Use the FlutterFlow action system to attach a Firebase authentication sign-up action to the sign-up button.
• Use the “Sign Up with Email” action and specify the inputs from the email and password text fields.
• Upon successful sign-up, send a verification email using Firebase’s built-in functionalities.

 

Sending Verification Email

 

• Create a custom action within FlutterFlow to send the email verification.
• In this custom action, write Dart code that accesses the current Firebase user and triggers the email verification function.
• Example code:

      if (FirebaseAuth.instance.currentUser != null) {
        FirebaseAuth.instance.currentUser.sendEmailVerification();
      }
      

• Attach this custom action to the logic flow immediately after a successful sign-up.

 

Verifying the Email

 

• Design a page in FlutterFlow where the user is informed that a verification email has been sent and is instructed to verify their email.
• Include a button that allows the user to refresh their verification status.
• Attach a custom action to this button that checks if the user’s email is verified by reloading the user and querying the emailVerified property with Dart code.

 

Example of Verification Check Code

 

• Write this logic inside a custom action:

      User user = FirebaseAuth.instance.currentUser;
      await user.reload();
      if (user.emailVerified) {
        // Navigate to the main application page
        Navigator.pushNamed(context, '/home');
      } else {
        // Notify the user to check their email again
        print('Email not verified.');
      }
      

 

Handling Verification Status

 

• In the verification page, handle UI feedback to notify the user if their email is still unverified. Provide options to resend the verification email if needed.
• Create a resend button and replicate the email sending custom action to allow users to receive another verification email.

 

Testing and Debugging

 

• Once the setup is complete, test the entire flow from signing up to email verification.
• Preview the app in FlutterFlow and test across various scenarios to identify potential issues.
• Ensure the email verification link works effectively on real devices.

 

Deploying the Application with Verification System

 

• Before deployment, ensure all custom actions are precisely configured and functional.
• Double-check the email template and ensure it reflects your brand's guidelines if you are using customized email templates in Firebase.
• Deploy the app and continue to monitor for any unexpected behaviors in the verification flow.

 

Following these steps will equip your FlutterFlow application with a robust custom email verification system, enhancing security and user authentication processes. Testing across diverse situations and configurations is crucial to confirm successful email verification implementation.