Use TupleKey(ObjectKey-AccountId-UserName) to store data to hive

(cherry picked from commit e0ace535d5f3af71eb13598d92524caf2c6d9bbf)

model/lib/extensions/account_extension.dart

@@ -1,16 +1,15 @@
 
 import 'package:jmap_dart_client/jmap/account_id.dart';
-import 'package:model/account/account.dart';
+import 'package:jmap_dart_client/jmap/core/account/account.dart';
+import 'package:model/account/jmap_account.dart';
 
 extension AccountExtension on Account {
-
-  Account fromAccountId({required AccountId accountId, required String apiUrl}) {
-    return Account(
-      id,
-      authenticationType,
-      isSelected: isSelected,
-      accountId: accountId,
-      apiUrl: apiUrl
-    );
+  JmapAccount toJmapAccount(AccountId accountId) {
+    return JmapAccount(
+      accountId,
+      name,
+      isPersonal,
+      isReadOnly,
+      accountCapabilities);
   }
 }