diff --git a/Sources/bowlin_project/lib/model/IAuthManager.dart b/Sources/bowlin_project/lib/model/IAuthManager.dart
index 65a9aac..ffacd82 100644
--- a/Sources/bowlin_project/lib/model/IAuthManager.dart
+++ b/Sources/bowlin_project/lib/model/IAuthManager.dart
@@ -1,5 +1,5 @@
 abstract class IAuthManager {
 
   // Methods
-  bool verifiedUser();
+  bool verifiedUser(String name, String password);
 }
diff --git a/Sources/bowlin_project/lib/model/IManager.dart b/Sources/bowlin_project/lib/model/IManager.dart
index b1d85d0..bb92ebf 100644
--- a/Sources/bowlin_project/lib/model/IManager.dart
+++ b/Sources/bowlin_project/lib/model/IManager.dart
@@ -1,5 +1,8 @@
 import 'User.dart';
 import 'Game.dart';
+import 'IUserManager.dart';
+import 'IGameManager.dart';
+import 'Game.dart';
 
 abstract class IManager {
   late User _userCurrent;
diff --git a/Sources/bowlin_project/lib/model/IUserManager.dart b/Sources/bowlin_project/lib/model/IUserManager.dart
index 7239dd6..2a96191 100644
--- a/Sources/bowlin_project/lib/model/IUserManager.dart
+++ b/Sources/bowlin_project/lib/model/IUserManager.dart
@@ -1,6 +1,6 @@
 import 'package:uuid/uuid.dart';
-import 'package:uuid/uuid_util.dart';
 import 'User.dart';
+import 'IAuthManager.dart';
 
 abstract class IUserManager {
   IAuthManager _authMgr;
diff --git a/Sources/bowlin_project/lib/model/Player.dart b/Sources/bowlin_project/lib/model/Player.dart
index dc4a169..4e4ac7d 100644
--- a/Sources/bowlin_project/lib/model/Player.dart
+++ b/Sources/bowlin_project/lib/model/Player.dart
@@ -1,5 +1,4 @@
 import 'package:uuid/uuid.dart';
-import 'package:uuid/uuid_util.dart';
 
 class Player {
   final Uuid _id;
diff --git a/Sources/bowlin_project/lib/model/User.dart b/Sources/bowlin_project/lib/model/User.dart
index a35d57b..2184225 100644
--- a/Sources/bowlin_project/lib/model/User.dart
+++ b/Sources/bowlin_project/lib/model/User.dart
@@ -1,10 +1,9 @@
 import 'package:uuid/uuid.dart';
-import 'package:uuid/uuid_util.dart';
 import 'Achievement.dart';
-import 'Animal.dart';
+import 'Player.dart';
 import 'Stat.dart';
 
-class User extends Animal {
+class User extends Player {
   String _mail;
   List<Stat> _stats = <Stat>[];
   List<User> _friends = <User>[];