Guest
It looks like the message got cut off at the end. Based on the context, the final part of the explanation was likely discussing how to use the `` function to handle state changes in the UI. Here’s a summary of what the complete message would have covered: --- whenever there’s an error I want a message to appear from the bottom saying this is the error, and if there’s any data I want to navigate from the signup page to the login page. A good way to do this is using ``. The `listen` function is present on `ref` and takes in a provider and a listener: - **Provider**: This will be our `Au view model provider`. - **Listener**: This will give us the previous and current value of the provider. Based on this information, you can handle the state changes as follows: 1. **Error Handling**: If the current state is an error, you can show an error message to the user. You can create a custom widget to display the error message. 2. **Data Handling**: If the current state contains data (i.e., the user is successfully signed up), you can navigate to the login page. Here’s a more detailed implementation of these steps: ### Custom Error Message Widget Create a custom widget in the `widgets` folder for displaying error messages. For example: **widgets/** ```dart import ’package:flutter/’; class ErrorMessageWidget extends StatelessWidget { final String message; final StackTrace? stackTrace; ErrorMessageWidget({required , }); @override Widget build(BuildContext context) { return Container( padding: (16.0), color: , child: Column( children: [ Text( message, style: TextStyle(fontSize: 18.0, color: ), ), if (stackTrace != null) Text( (), style: TextStyle(fontSize: 14.0, color: ), ), ], ), ); } } ``` ### Listening to State Changes In the ``, use `` to handle state changes: ```dart import ’package:flutter/’; import ’package:flutter_riverpod/’; import ’widgets/’; class SignUpPage extends StatelessWidget { @override Widget build(BuildContext context) { final ref = (signUpPageProvider); return
