diff --git a/lib/features/login/data/datasource/login_username_datasource.dart b/lib/features/login/data/datasource/login_username_datasource.dart
new file mode 100644
index 000000000..545e188b9
--- /dev/null
+++ b/lib/features/login/data/datasource/login_username_datasource.dart
@@ -0,0 +1,7 @@
+import 'package:tmail_ui_user/features/login/domain/model/recent_login_username.dart';
+
+abstract class LoginUsernameDataSource {
+  Future<void> saveLoginUsername(RecentLoginUsername username);
+
+  Future<List<RecentLoginUsername>> getAllRecentLoginUsernamesLatest({int? limit, String? pattern});
+}
\ No newline at end of file
diff --git a/lib/features/login/domain/repository/login_username_repository.dart b/lib/features/login/domain/repository/login_username_repository.dart
new file mode 100644
index 000000000..e8e934cf5
--- /dev/null
+++ b/lib/features/login/domain/repository/login_username_repository.dart
@@ -0,0 +1,7 @@
+import 'package:tmail_ui_user/features/login/domain/model/recent_login_username.dart';
+
+abstract class LoginUsernameRepository {
+  Future<void> saveLoginUsername(RecentLoginUsername recentLoginUsername);
+
+  Future<List<RecentLoginUsername>> getAllRecentLoginUsernameLatest({int? limit, String? pattern});
+}
\ No newline at end of file