first commit

lib/services/my_preferences.dart

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+import 'package:shared_preferences/shared_preferences.dart';
+
+class MySharedPrefs {
+  final Future<SharedPreferences> prefs = SharedPreferences.getInstance();
+
+  Future<String?> getString(String key) async {
+    final SharedPreferences prefs = await this.prefs;
+    return prefs.getString(key);
+  }
+
+  Future<bool> setString(String key, String value) async {
+    final SharedPreferences prefs = await this.prefs;
+    return prefs.setString(key, value);
+  }
+
+  Future<bool> removeString(String key) async {
+    final SharedPreferences prefs = await this.prefs;
+    return prefs.remove(key);
+  }
+
+  Future<bool> clear() async {
+    final SharedPreferences prefs = await this.prefs;
+    return prefs.clear();
+  }
+}