feat: customAppbarBuilder

lib/src/auth_screen.dart

@@ -11,6 +11,7 @@ class AuthScreen extends StatefulWidget {
     required this.nextBtnTitle,
     required this.previousBtnTitle,
     required this.onFinish,
+    this.customAppBar,
     super.key,
   }) : assert(steps.length > 0, 'At least one step is required');
 
@@ -23,6 +24,7 @@ class AuthScreen extends StatefulWidget {
   final String submitBtnTitle;
   final String nextBtnTitle;
   final String previousBtnTitle;
+  final AppBar? customAppBar;
 
   @override
   State<AuthScreen> createState() => _AuthScreenState();
@@ -34,12 +36,16 @@ class _AuthScreenState extends State<AuthScreen> {
   final _animationDuration = const Duration(milliseconds: 300);
   final _animationCurve = Curves.ease;
 
+  AppBar get _appBar =>
+      widget.customAppBar ??
+      AppBar(
+        title: Text(widget.title),
+      );
+
   @override
   Widget build(BuildContext context) => Scaffold(
         backgroundColor: Theme.of(context).backgroundColor,
-        appBar: AppBar(
-          title: Text(widget.title),
-        ),
+        appBar: _appBar,
         body: Form(
           key: _formKey,
           child: PageView(

lib/src/config/registration_options.dart

@@ -1,4 +1,4 @@
-import 'package:flutter/widgets.dart';
+import 'package:flutter/material.dart';
 import 'package:flutter_registration/flutter_registration.dart';
 
 class RegistrationOptions {
@@ -7,12 +7,14 @@ class RegistrationOptions {
     required this.registrationSteps,
     required this.afterRegistration,
     this.registrationTranslations = const RegistrationTranslations(),
+    this.customAppbarBuilder,
   });
 
   final RegistrationTranslations registrationTranslations;
   final List<AuthStep> registrationSteps;
   final VoidCallback afterRegistration;
   final RegistrationRepository registrationRepository;
+  final AppBar Function(String title)? customAppbarBuilder;
 
   static List<AuthStep> get defaultSteps => [
         AuthStep(

lib/src/registration_screen.dart

@@ -32,6 +32,9 @@ class RegistrationScreen extends StatelessWidget {
 
     return AuthScreen(
       steps: registrationOptions.registrationSteps,
+      customAppBar: registrationOptions.customAppbarBuilder?.call(
+        translations.title,
+      ),
       onFinish: register,
       title: translations.title,
       submitBtnTitle: translations.registerBtn,