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lib/features/auth/domain/usecases/login_usecase.dart

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+import '../../domain/entities/user.dart';
+import '../../domain/repositories/auth_repository.dart';
+
+class LoginUseCase {
+  LoginUseCase({required this.repository});
+
+  final AuthRepository repository;
+
+  Future<User> call({
+    required String email,
+    required String password,
+  }) {
+    return repository.login(email: email, password: password);
+  }
+}

lib/features/auth/domain/usecases/logout_usecase.dart

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+import '../../domain/repositories/auth_repository.dart';
+
+class LogoutUseCase {
+  LogoutUseCase({required this.repository});
+
+  final AuthRepository repository;
+
+  Future<void> call() => repository.logout();
+}

lib/features/auth/domain/usecases/register_usecase.dart

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+import '../../domain/entities/user.dart';
+import '../../domain/repositories/auth_repository.dart';
+
+class RegisterUseCase {
+  RegisterUseCase({required this.repository});
+
+  final AuthRepository repository;
+
+  Future<User> call({
+    required String email,
+    required String password,
+    required String name,
+  }) {
+    return repository.register(
+      email: email,
+      password: password,
+      name: name,
+    );
+  }
+}