diff --git a/packages/dox-app/db/migration/2023_07_16_131937700_create_user_table.sql b/packages/dox-app/db/migration/2023_07_16_131937700_create_user_table.sql
index fc6200a..0395319 100644
--- a/packages/dox-app/db/migration/2023_07_16_131937700_create_user_table.sql
+++ b/packages/dox-app/db/migration/2023_07_16_131937700_create_user_table.sql
@@ -2,7 +2,7 @@
 CREATE TABLE IF NOT EXISTS users (
     id serial PRIMARY KEY,
 	name VARCHAR ( 255 ) NOT NULL,
-	email VARCHAR ( 255 ) NOT NULL,
+	email VARCHAR ( 255 ) UNIQUE NOT NULL,
 	password VARCHAR ( 255 ) NOT NULL,
 	deleted_at TIMESTAMP,
     created_at TIMESTAMP,
diff --git a/packages/dox-app/lib/config/auth_config.dart b/packages/dox-app/lib/config/auth_config.dart
deleted file mode 100644
index 3341107..0000000
--- a/packages/dox-app/lib/config/auth_config.dart
+++ /dev/null
@@ -1,20 +0,0 @@
-import 'package:dox_app/models/user/user.model.dart';
-import 'package:dox_auth/dox_auth.dart';
-import 'package:dox_core/dox_core.dart';
-
-class AuthConfig extends IAuthConfig {
-  @override
-  String get defaultGuard => 'web';
-
-  @override
-  Map<String, AuthGuard> get guards => <String, AuthGuard>{
-        'web': AuthGuard(
-          driver: JwtAuthDriver(
-            secret: SecretKey(Env.get('APP_KEY')),
-          ),
-          provider: AuthProvider(
-            model: () => User(),
-          ),
-        ),
-      };
-}
diff --git a/packages/dox-app/lib/services/auth_service.dart b/packages/dox-app/lib/services/auth_service.dart
index 2a7b50b..7728f23 100644
--- a/packages/dox-app/lib/services/auth_service.dart
+++ b/packages/dox-app/lib/services/auth_service.dart
@@ -1,10 +1,23 @@
-import 'package:dox_app/config/auth_config.dart';
+import 'package:dox_app/models/user/user.model.dart';
 import 'package:dox_auth/dox_auth.dart';
 import 'package:dox_core/dox_core.dart';
 
 class AuthService implements DoxService {
   @override
   void setup() {
-    Auth.initialize(AuthConfig());
+    Auth.initialize(AuthConfig(
+      /// default auth guard
+      defaultGuard: 'web',
+
+      /// list of auth guards
+      guards: <String, AuthGuard>{
+        'web': AuthGuard(
+          driver: JwtAuthDriver(secret: SecretKey(Env.get('APP_KEY'))),
+          provider: AuthProvider(
+            model: () => User(),
+          ),
+        ),
+      },
+    ));
   }
 }
diff --git a/packages/dox-auth/lib/src/auth.dart b/packages/dox-auth/lib/src/auth.dart
index 0a4ceb1..0348521 100644
--- a/packages/dox-auth/lib/src/auth.dart
+++ b/packages/dox-auth/lib/src/auth.dart
@@ -9,7 +9,7 @@ class Auth implements IAuth {
 
   AuthDriver get _driver => AuthEngine().driver;
 
-  static void initialize(IAuthConfig authConfig) {
+  static void initialize(AuthConfig authConfig) {
     AuthEngine().init(authConfig);
   }
 
diff --git a/packages/dox-auth/lib/src/auth_engine.dart b/packages/dox-auth/lib/src/auth_engine.dart
index dbe6c31..dc5e507 100644
--- a/packages/dox-auth/lib/src/auth_engine.dart
+++ b/packages/dox-auth/lib/src/auth_engine.dart
@@ -1,7 +1,7 @@
 import 'package:dox_auth/src/interfaces.dart';
 
 class AuthEngine {
-  late IAuthConfig config;
+  late AuthConfig config;
 
   /// get auth guard
   AuthGuard get guard => config.guards[config.defaultGuard]!;
@@ -17,7 +17,7 @@ class AuthEngine {
   factory AuthEngine() => _singleton;
   AuthEngine._internal();
 
-  void init(IAuthConfig authConfig) {
+  void init(AuthConfig authConfig) {
     config = authConfig;
   }
 }
diff --git a/packages/dox-auth/lib/src/interfaces.dart b/packages/dox-auth/lib/src/interfaces.dart
index 44744c6..abc12fa 100644
--- a/packages/dox-auth/lib/src/interfaces.dart
+++ b/packages/dox-auth/lib/src/interfaces.dart
@@ -23,10 +23,14 @@ class AuthProvider {
   });
 }
 
-abstract class IAuthConfig {
-  String get defaultGuard => 'web';
+class AuthConfig {
+  final String defaultGuard;
+  final Map<String, AuthGuard> guards;
 
-  Map<String, AuthGuard> get guards => <String, AuthGuard>{};
+  AuthConfig({
+    required this.defaultGuard,
+    this.guards = const <String, AuthGuard>{},
+  });
 }
 
 abstract class AuthDriver {