Deprecated: ColorScheme.background is now ColorScheme.surface

lib/components/my_drawer.dart

@@ -16,7 +16,7 @@ class MyDrawer extends StatelessWidget {
   @override
   Widget build(BuildContext context) {
     return Drawer(
-      backgroundColor: Theme.of(context).colorScheme.background,
+      backgroundColor: Theme.of(context).colorScheme.surface,
       child: CustomScrollView(slivers: [
         SliverFillRemaining(
           hasScrollBody: false,

lib/pages/login_page.dart

@@ -50,7 +50,7 @@ class LoginPage extends StatelessWidget {
   @override
   Widget build(BuildContext context) {
     return Scaffold(
-      backgroundColor: Theme.of(context).colorScheme.background,
+      backgroundColor: Theme.of(context).colorScheme.surface,
       body: Center(
         child: SingleChildScrollView(
           child: Column(

lib/pages/register_page.dart

@@ -54,7 +54,7 @@ class RegisterPage extends StatelessWidget {
   @override
   Widget build(BuildContext context) {
     return Scaffold(
-      backgroundColor: Theme.of(context).colorScheme.background,
+      backgroundColor: Theme.of(context).colorScheme.surface,
       body: Center(
         child: ListView(children: [
           Column(mainAxisAlignment: MainAxisAlignment.center, children: [

lib/pages/settings_page.dart

@@ -9,7 +9,7 @@ class SettingsPage extends StatelessWidget {
   @override
   Widget build(BuildContext context) {
     return Scaffold(
-      backgroundColor: Theme.of(context).colorScheme.background,
+      backgroundColor: Theme.of(context).colorScheme.surface,
       appBar: AppBar(
         title: const Text("Settings"),
       ),

lib/themes/dark_mode.dart

@@ -2,7 +2,7 @@ import 'package:flutter/material.dart';
 
 ThemeData darkMode = ThemeData(
   colorScheme: ColorScheme.dark(
-    background: Colors.grey.shade900,
+    surface: Colors.grey.shade900,
     primary: Colors.grey.shade600,
     secondary: Colors.grey.shade700,
     tertiary: Colors.grey.shade800,

lib/themes/light_mode.dart

@@ -2,7 +2,7 @@ import 'package:flutter/material.dart';
 
 ThemeData lightMode = ThemeData(
   colorScheme: ColorScheme.light(
-    background: Colors.grey.shade300,
+    surface: Colors.grey.shade300,
     primary: Colors.grey.shade500,
     secondary: Colors.grey.shade200,
     tertiary: Colors.white,