fix user list error handling

packages/stream_chat_flutter/lib/src/user_list_view.dart

@@ -128,7 +128,7 @@ class UserListView extends StatefulWidget {
   final int crossAxisCount;
 
   /// The builder that will be used in case of error
-  final Widget Function(Error error)? errorBuilder;
+  final ErrorBuilder? errorBuilder;
 
   /// The builder that will be used to build the list
   final Widget Function(BuildContext context, List<ListItem> users)?
@@ -153,8 +153,8 @@ class _UserListViewState extends State<UserListView>
   @override
   Widget build(BuildContext context) {
     final child = UserListCore(
-      errorBuilder: widget.errorBuilder as Widget Function(Object)? ??
-          (err) => _buildError(err as Error),
+      errorBuilder: widget.errorBuilder ??
+          (BuildContext context, Object err) => _buildError(err),
       emptyBuilder: widget.emptyBuilder ?? (context) => _buildEmpty(),
       loadingBuilder: widget.loadingBuilder ??
           (context) => LayoutBuilder(
@@ -194,12 +194,10 @@ class _UserListViewState extends State<UserListView>
   bool get isListAlreadySorted =>
       widget.sort?.any((e) => e.field == 'name' && e.direction == 1) ?? false;
 
-  Widget _buildError(Error error) {
-    print(error.stackTrace);
-
+  Widget _buildError(Object error) {
     var message = error.toString();
     if (error is DioError) {
-      final dioError = error as DioError;
+      final dioError = error;
       if (dioError.type == DioErrorType.response) {
         message = dioError.message;
       } else {