add depedencies

macos/Flutter/GeneratedPluginRegistrant.swift

@@ -5,6 +5,8 @@
 import FlutterMacOS
 import Foundation
 
+import shared_preferences_foundation
 
 func RegisterGeneratedPlugins(registry: FlutterPluginRegistry) {
+  SharedPreferencesPlugin.register(with: registry.registrar(forPlugin: "SharedPreferencesPlugin"))
 }

pubspec.yaml

@@ -30,9 +30,9 @@ environment:
 # versions available, run `flutter pub outdated`.
 dependencies:
   cupertino_icons: ^1.0.2
-  file_picker: ^5.3.2
   flutter:
     sdk: flutter
+  shared_preferences: ^2.1.1
   url_strategy: ^0.2.0
 
 dev_dependencies: