diff --git a/Sources/bowlin_project/lib/model/Achievement.dart b/Sources/bowlin_project/lib/model/Achievement.dart
index f4c1236..cfa8ffc 100644
--- a/Sources/bowlin_project/lib/model/Achievement.dart
+++ b/Sources/bowlin_project/lib/model/Achievement.dart
@@ -1,13 +1,13 @@
 class Achievement {
-  
   String _name;
-  
+
+  // Constructor
   Achievement(this._name);
 
+  // Getters and setters
   String get name => _name;
 
   set name(String value) {
     _name = value;
   }
-
 }
diff --git a/Sources/bowlin_project/lib/model/Game.dart b/Sources/bowlin_project/lib/model/Game.dart
index e7a140a..bf0065b 100644
--- a/Sources/bowlin_project/lib/model/Game.dart
+++ b/Sources/bowlin_project/lib/model/Game.dart
@@ -1,22 +1,19 @@
-import 'dart:ffi';
-
 import 'package:uuid/uuid.dart';
-import 'package:uuid/uuid_util.dart';
 
 class Game {
-  
   Uuid _id;
   DateTime _time;
   int _pointsCurrentUser;
   bool _isFinished;
-  List<String> _playerImages = <String>[];
+  List<String> _playerImages = [];
 
-  
-  Game(this._id, this._time, this._players, this._winner);
+  // Constructor
+  Game(this._id, this._time, this._pointsCurrentUser, this._isFinished, this._playerImages);
 
-  get id => _id;
+  // Getters and setters
+  Uuid get id => _id;
 
-  set id(value) {
+  set id(Uuid value) {
     _id = value;
   }
 
@@ -43,5 +40,4 @@ class Game {
   set playerImages(List<String> value) {
     _playerImages = value;
   }
-
 }
diff --git a/Sources/bowlin_project/lib/model/GameDetail.dart b/Sources/bowlin_project/lib/model/GameDetail.dart
new file mode 100644
index 0000000..2f8f20c
--- /dev/null
+++ b/Sources/bowlin_project/lib/model/GameDetail.dart
@@ -0,0 +1,82 @@
+import 'package:uuid/uuid.dart';
+import 'Player.dart';
+import 'Round.dart';
+
+class GameDetail {
+  Uuid _id;
+  DateTime _time;
+  Uuid _winner;
+  int _nbPoints;
+  bool _isFinished;
+  Round _currentRound;
+  Player _host;
+  List<Round> _rounds = [];
+  List<Player> _players = [];
+
+  // Constructor
+  GameDetail(
+      this._id,
+      this._time,
+      this._winner,
+      this._nbPoints,
+      this._isFinished,
+      this._currentRound,
+      this._host,
+      this._rounds,
+      this._players);
+      
+  // Getters and setters
+  Uuid get id => _id;
+
+  set id(Uuid value) {
+    _id = value;
+  }
+
+  DateTime get time => _time;
+
+  set time(DateTime value) {
+    _time = value;
+  }
+
+  Uuid get winner => _winner;
+
+  set winner(Uuid value) {
+    _winner = value;
+  }
+
+  int get nbPoints => _nbPoints;
+
+  set nbPoints(int value) {
+    _nbPoints = value;
+  }
+
+  bool get isFinished => _isFinished;
+
+  set isFinished(bool value) {
+    _isFinished = value;
+  }
+
+  Round get currentRound => _currentRound;
+
+  set currentRound(Round value) {
+    _currentRound = value;
+  }
+
+  Player get host => _host;
+
+  set host(Player value) {
+    _host = value;
+  }
+
+  List<Round> get rounds => _rounds;
+
+  set rounds(List<Round> value) {
+    _rounds = value;
+  }
+
+  List<Player> get players => _players;
+
+  set players(List<Player> value) {
+    _players = value;
+  }
+}
diff --git a/Sources/bowlin_project/lib/model/Guest.dart b/Sources/bowlin_project/lib/model/Guest.dart
index 7417987..a531185 100644
--- a/Sources/bowlin_project/lib/model/Guest.dart
+++ b/Sources/bowlin_project/lib/model/Guest.dart
@@ -1,9 +1,7 @@
 import 'package:uuid/uuid.dart';
 import 'package:uuid/uuid_util.dart';
-import 'Achievement.dart';
-
-class User {
-
-  User(Uuid id, String image, String name): super(id, image, name);
 
+class Guest extends Player {
+  // Constructor
+  Guest(Uuid id, String image, String name) : super(id, image, name);
 }
diff --git a/Sources/bowlin_project/lib/model/IAuthManager.dart b/Sources/bowlin_project/lib/model/IAuthManager.dart
new file mode 100644
index 0000000..65a9aac
--- /dev/null
+++ b/Sources/bowlin_project/lib/model/IAuthManager.dart
@@ -0,0 +1,5 @@
+abstract class IAuthManager {
+
+  // Methods
+  bool verifiedUser();
+}
diff --git a/Sources/bowlin_project/lib/model/IGameManager.dart b/Sources/bowlin_project/lib/model/IGameManager.dart
new file mode 100644
index 0000000..2254d75
--- /dev/null
+++ b/Sources/bowlin_project/lib/model/IGameManager.dart
@@ -0,0 +1,12 @@
+import 'package:uuid/uuid.dart';
+import 'package:uuid/uuid_util.dart';
+import 'GameDetail.dart';
+import 'Player.dart';
+
+abstract class IGameManager {
+  // Methods
+  GameDetail getGameById(Uuid id);
+  List<GameDetail> getGamesByPlayerId(Uuid id);
+  List<GameDetail> getGamesByPlayer(Player user);
+  List<GameDetail> getGamesByPlayers(List<Player> users);
+}
diff --git a/Sources/bowlin_project/lib/model/IManager.dart b/Sources/bowlin_project/lib/model/IManager.dart
index 715f244..b1d85d0 100644
--- a/Sources/bowlin_project/lib/model/IManager.dart
+++ b/Sources/bowlin_project/lib/model/IManager.dart
@@ -1,30 +1,18 @@
-import 'package:bowl_in/model/Game.dart';
-
 import 'User.dart';
+import 'Game.dart';
 
 abstract class IManager {
-  User _userCurrent;
-
-  User get userCurrent => _userCurrent;
-
-  set userCurrent(User value) {
-    _userCurrent = value;
-  }
-
+  late User _userCurrent;
   late Game _gameCurrent;
-  List<Game> _games;
+  IUserManager _userMgr;
+  IGameManager _gameMgr;
 
+  // Constructor
+  IManager(this._userCurrent, this._gameCurrent);
+  
+  // Getters and setters
+  User get userCurrent => _userCurrent;
   Game get gameCurrent => _gameCurrent;
-
-  set gameCurrent(Game value) {
-    _gameCurrent = value;
-  }
-
-  List<Game> get games => _games;
-
-  set games(List<Game> value) {
-    _games = value;
-  }
-
-  IManager(this._userCurrent, this._gameCurrent, this._games);
+  IUserManager get userMgr => _userMgr;
+  IGameManager get gameMgr => _gameMgr;
 }
diff --git a/Sources/bowlin_project/lib/model/IUserManager.dart b/Sources/bowlin_project/lib/model/IUserManager.dart
new file mode 100644
index 0000000..7239dd6
--- /dev/null
+++ b/Sources/bowlin_project/lib/model/IUserManager.dart
@@ -0,0 +1,12 @@
+import 'package:uuid/uuid.dart';
+import 'package:uuid/uuid_util.dart';
+import 'User.dart';
+
+abstract class IUserManager {
+  IAuthManager _authMgr;
+
+  // Methods
+  IAuthManager get authMgr => _authMgr;
+  List<User> getUsersByName(String name);
+  User getUserById(Uuid id);
+}
diff --git a/Sources/bowlin_project/lib/model/Player.dart b/Sources/bowlin_project/lib/model/Player.dart
index e59f165..dc4a169 100644
--- a/Sources/bowlin_project/lib/model/Player.dart
+++ b/Sources/bowlin_project/lib/model/Player.dart
@@ -1,16 +1,16 @@
 import 'package:uuid/uuid.dart';
 import 'package:uuid/uuid_util.dart';
-import 'Achievement.dart';
 
 class Player {
-
   final Uuid _id;
   String _image;
   String _name;
 
-  User(this._id, this._image, this._name);
+  // Constructor
+  Player(this._id, this._image, this._name);
 
-  get id => _id;
+  // Getters and setters
+  Uuid get id => _id;
 
   String get name => _name;
 
@@ -23,5 +23,4 @@ class Player {
   set image(String value) {
     _image = value;
   }
-
 }
diff --git a/Sources/bowlin_project/lib/model/Round.dart b/Sources/bowlin_project/lib/model/Round.dart
index 829ec71..f74d9a3 100644
--- a/Sources/bowlin_project/lib/model/Round.dart
+++ b/Sources/bowlin_project/lib/model/Round.dart
@@ -1,11 +1,36 @@
+import 'Player.dart';
+
 class Round {
-  int _nbPoints;
+  int _firstThrow;
+  int _secondThrow;
+  int _points;
+  Player _player;
+
+  // Constructor
+  Round(this._firstThrow, this._secondThrow, this._points, this._player);
+
+  // Getters and setters
+  int get firstThrow => _firstThrow;
+
+  set firstThrow(int value) {
+    _firstThrow = value;
+  }
 
-  int get nbPoints => _nbPoints;
+  int get secondThrow => _secondThrow;
 
-  set nbPoints(int value) {
-    _nbPoints = value;
+  set secondThrow(int value) {
+    _secondThrow = value;
   }
 
-  Round(this._nbPoints);
+  int get points => _points;
+
+  set points(int value) {
+    _points = value;
+  }
+
+  Player get player => _player;
+
+  set player(Player value) {
+    _player = value;
+  }
 }
diff --git a/Sources/bowlin_project/lib/model/Stat.dart b/Sources/bowlin_project/lib/model/Stat.dart
index 5e8117f..a6d47cb 100644
--- a/Sources/bowlin_project/lib/model/Stat.dart
+++ b/Sources/bowlin_project/lib/model/Stat.dart
@@ -1,5 +1,4 @@
 class Stat {
-
   int _nbVictory;
   int _nbDefeat;
   int _nbGames;
@@ -10,9 +9,20 @@ class Stat {
   int _avgScore;
   double _avgPinsPerRound;
 
-  Round(this._nbVictory,this._nbDefeat,this._nbGames,this._highscore,this._nbStrikes,this._nbSpares,this._avgScore,this._avgPinsPerRound);
-
-
+  // Constructor
+  Stat(
+    this._nbVictory,
+    this._nbDefeat,
+    this._nbGames,
+    this._highscore,
+    this._nbStrikes,
+    this._nbSpares,
+    this._nbScore,
+    this._avgScore,
+    this._avgPinsPerRound,
+  );
+
+  // Getters and setters
   int get nbVictory => _nbVictory;
 
   set nbVictory(int value) {
@@ -66,5 +76,4 @@ class Stat {
   set avgPinsPerRound(double value) {
     _avgPinsPerRound = value;
   }
-
 }
diff --git a/Sources/bowlin_project/lib/model/User.dart b/Sources/bowlin_project/lib/model/User.dart
index d55fe0e..a35d57b 100644
--- a/Sources/bowlin_project/lib/model/User.dart
+++ b/Sources/bowlin_project/lib/model/User.dart
@@ -1,15 +1,20 @@
 import 'package:uuid/uuid.dart';
 import 'package:uuid/uuid_util.dart';
 import 'Achievement.dart';
+import 'Animal.dart';
+import 'Stat.dart';
 
-class User {
-
+class User extends Animal {
   String _mail;
   List<Stat> _stats = <Stat>[];
+  List<User> _friends = <User>[];
   List<Achievement> _achievements = <Achievement>[];
 
-  User(Uuid id, String image, String name, this._achievements, this._stats ): super(id, image, name);
+  // Constructor
+  User(Uuid id, String image, String name, this._achievements, this._friends, this._stats)
+      : super(id, image, name);
 
+  // Getters and setters
   String get mail => _mail;
 
   set mail(String value) {
@@ -22,10 +27,15 @@ class User {
     _achievements = value;
   }
 
+  List<User> get friends => _friends;
+
+  set friends(List<User> value) {
+    _friends = value;
+  }
+
   List<Stat> get stats => _stats;
 
   set stats(List<Stat> value) {
     _stats = value;
   }
-
 }