feat: add title widget and login button builder

lib/src/auth_screen.dart

@@ -19,6 +19,8 @@ class AuthScreen extends StatefulWidget {
     this.customBackgroundColor,
     this.nextButtonBuilder,
     this.previousButtonBuilder,
+    this.titleWidget,
+    this.loginButton,
     super.key,
   }) : assert(steps.length > 0, 'At least one step is required');
 
@@ -35,6 +37,8 @@ class AuthScreen extends StatefulWidget {
   final Color? customBackgroundColor;
   final Widget Function(Future<void> Function(), String)? nextButtonBuilder;
   final Widget? Function(VoidCallback, String)? previousButtonBuilder;
+  final Widget? titleWidget;
+  final Widget? loginButton;
 
   @override
   State<AuthScreen> createState() => _AuthScreenState();
@@ -114,10 +118,12 @@ class _AuthScreenState extends State<AuthScreen> {
           children: <Widget>[
             for (AuthStep step in widget.steps)
               Column(
-                mainAxisAlignment: MainAxisAlignment.spaceBetween,
+                // mainAxisAlignment: MainAxisAlignment.spaceBetween,
                 children: [
+                  // Text(widget.title),
+                  if (widget.titleWidget != null) widget.titleWidget!,
+                  const SizedBox(height: 40),
                   Flexible(
-                    child: Center(
                     child: ListView(
                       physics: const ClampingScrollPhysics(),
                       shrinkWrap: true,
@@ -141,11 +147,11 @@ class _AuthScreenState extends State<AuthScreen> {
                       ],
                     ),
                   ),
-                  ),
+                  const Spacer(),
                   Padding(
                     padding: const EdgeInsets.only(
                       top: 15.0,
-                      bottom: 30.0,
+                      // bottom: 30.0,
                       left: 30.0,
                       right: 30.0,
                     ),
@@ -209,7 +215,12 @@ class _AuthScreenState extends State<AuthScreen> {
                             ),
                       ],
                     ),
-                  )
+                  ),
+                  if (widget.loginButton != null)
+                    Padding(
+                      padding: const EdgeInsets.all(8.0),
+                      child: widget.loginButton!,
+                    ),
                 ],
               ),
           ],

lib/src/config/registration_options.dart

@@ -18,6 +18,8 @@ class RegistrationOptions {
     this.nextButtonBuilder,
     this.previousButtonBuilder,
     this.backgroundColor,
+    this.titleWidget,
+    this.loginButton,
   });
 
   final RegistrationTranslations registrationTranslations;
@@ -31,6 +33,8 @@ class RegistrationOptions {
   final Widget? Function(VoidCallback onPressed, String label)?
       previousButtonBuilder;
   final Color? backgroundColor;
+  Widget? titleWidget;
+  Widget? loginButton;
 
   static List<AuthStep> getDefaultSteps({
     TextEditingController? emailController,

lib/src/model/auth_text_field.dart

@@ -57,7 +57,9 @@ class AuthTextField extends AuthField {
       }
     }
 
-    return TextFormField(
+    return Padding(
+      padding: const EdgeInsets.all(8.0),
+      child: TextFormField(
         style: textStyle,
         decoration: textFieldDecoration ??
             InputDecoration(
@@ -81,6 +83,7 @@ class AuthTextField extends AuthField {
 
           return null;
         },
+      ),
     );
   }
 }

lib/src/registration_screen.dart

@@ -53,6 +53,8 @@ class RegistrationScreen extends StatelessWidget {
       nextButtonBuilder: registrationOptions.nextButtonBuilder,
       previousButtonBuilder: registrationOptions.previousButtonBuilder,
       customBackgroundColor: registrationOptions.backgroundColor,
+      titleWidget: registrationOptions.titleWidget,
+      loginButton: registrationOptions.loginButton,
     );
   }
 }