diff --git a/code/server/DataBase/Entity/Chat.cs b/code/server/DataBase/Entity/Chat.cs
index 3661652..23a0921 100644
--- a/code/server/DataBase/Entity/Chat.cs
+++ b/code/server/DataBase/Entity/Chat.cs
@@ -1,7 +1,18 @@
 
+using System.ComponentModel.DataAnnotations.Schema;
+
 namespace DataBase.Entity
 {
     public class Chat
     {
+        public int chatId { get; set; }
+        public int sender { get; set; }
+        public int recipient { get; set; }
+
+        [ForeignKey("sender")]
+        public Player PlayerSender { get; set; }
+
+        [ForeignKey("recipient")]
+        public Player PlayerRecipient { get; set; }
     }
 }
diff --git a/code/server/DataBase/Entity/Game.cs b/code/server/DataBase/Entity/Game.cs
index 1dcca72..56ed7b0 100644
--- a/code/server/DataBase/Entity/Game.cs
+++ b/code/server/DataBase/Entity/Game.cs
@@ -1,7 +1,21 @@
 
+using System.ComponentModel.DataAnnotations;
+using System.ComponentModel.DataAnnotations.Schema;
+
 namespace DataBase.Entity
 {
     public class Game
     {
+        public int gameId { get; set; }
+        public int durationGame { get; set; }
+        public int nbMaxEchanges { get; set; }
+        public int winner { get; set; }
+        public int loser { get; set; }
+
+        [ForeignKey("winner")]
+        public Player PlayerWinner { get; set; }
+
+        [ForeignKey("loser")]
+        public Player PlayerLoser { get; set; }
     }
 }
diff --git a/code/server/DataBase/Entity/Message.cs b/code/server/DataBase/Entity/Message.cs
index 4ba6f65..f3e1e09 100644
--- a/code/server/DataBase/Entity/Message.cs
+++ b/code/server/DataBase/Entity/Message.cs
@@ -1,7 +1,21 @@
 
+using System.ComponentModel.DataAnnotations;
+using System.ComponentModel.DataAnnotations.Schema;
+
 namespace DataBase.Entity
 {
     public class Message
     {
+        public int messageId { get; set; }
+        public string message { get; set; }
+        public TimeSpan timestamp { get; set; }
+        public int player { get; set; }
+        public int chat { get; set; }
+
+        [ForeignKey("player")]
+        public Player PlayerId { get; set; }
+
+        [ForeignKey("chat")]
+        public Chat ChatId { get; set; }
     }
 }
diff --git a/code/server/DataBase/Entity/Player.cs b/code/server/DataBase/Entity/Player.cs
index 37ff6a9..8663ff6 100644
--- a/code/server/DataBase/Entity/Player.cs
+++ b/code/server/DataBase/Entity/Player.cs
@@ -1,7 +1,13 @@
 
+using System.ComponentModel.DataAnnotations;
+
 namespace DataBase.Entity
 {
     public class Player
     {
+        public int playerId { get; set; }
+        public string name { get; set; }
+        public int nbBallTouchTotal { get; set; }
+        public int timePlayed { get; set; }
     }
 }
diff --git a/code/server/DataBase/Migrations/20230216153344_initMigration.Designer.cs b/code/server/DataBase/Migrations/20230216153344_initMigration.Designer.cs
new file mode 100644
index 0000000..0cdd6a2
--- /dev/null
+++ b/code/server/DataBase/Migrations/20230216153344_initMigration.Designer.cs
@@ -0,0 +1,179 @@
+// <auto-generated />
+using System;
+using DataBase;
+using Microsoft.EntityFrameworkCore;
+using Microsoft.EntityFrameworkCore.Infrastructure;
+using Microsoft.EntityFrameworkCore.Migrations;
+using Microsoft.EntityFrameworkCore.Storage.ValueConversion;
+
+#nullable disable
+
+namespace DataBase.Migrations
+{
+    [DbContext(typeof(PongDbContext))]
+    [Migration("20230216153344_initMigration")]
+    partial class initMigration
+    {
+        /// <inheritdoc />
+        protected override void BuildTargetModel(ModelBuilder modelBuilder)
+        {
+#pragma warning disable 612, 618
+            modelBuilder.HasAnnotation("ProductVersion", "7.0.3");
+
+            modelBuilder.Entity("DataBase.Entity.Chat", b =>
+                {
+                    b.Property<int>("chatId")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("INTEGER");
+
+                    b.Property<int>("recipient")
+                        .HasColumnType("INTEGER");
+
+                    b.Property<int>("sender")
+                        .HasColumnType("INTEGER");
+
+                    b.HasKey("chatId");
+
+                    b.HasIndex("recipient");
+
+                    b.HasIndex("sender");
+
+                    b.ToTable("Chats");
+                });
+
+            modelBuilder.Entity("DataBase.Entity.Game", b =>
+                {
+                    b.Property<int>("gameId")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("INTEGER");
+
+                    b.Property<int>("durationGame")
+                        .HasColumnType("INTEGER");
+
+                    b.Property<int>("loser")
+                        .HasColumnType("INTEGER");
+
+                    b.Property<int>("nbMaxEchanges")
+                        .HasColumnType("INTEGER");
+
+                    b.Property<int>("winner")
+                        .HasColumnType("INTEGER");
+
+                    b.HasKey("gameId");
+
+                    b.HasIndex("loser");
+
+                    b.HasIndex("winner");
+
+                    b.ToTable("Games");
+                });
+
+            modelBuilder.Entity("DataBase.Entity.Message", b =>
+                {
+                    b.Property<int>("messageId")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("INTEGER");
+
+                    b.Property<int>("chat")
+                        .HasColumnType("INTEGER");
+
+                    b.Property<string>("message")
+                        .IsRequired()
+                        .HasColumnType("TEXT");
+
+                    b.Property<int>("player")
+                        .HasColumnType("INTEGER");
+
+                    b.Property<TimeSpan>("timestamp")
+                        .HasColumnType("TEXT");
+
+                    b.HasKey("messageId");
+
+                    b.HasIndex("chat");
+
+                    b.HasIndex("player");
+
+                    b.ToTable("Messages");
+                });
+
+            modelBuilder.Entity("DataBase.Entity.Player", b =>
+                {
+                    b.Property<int>("playerId")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("INTEGER");
+
+                    b.Property<string>("name")
+                        .IsRequired()
+                        .HasColumnType("TEXT");
+
+                    b.Property<int>("nbBallTouchTotal")
+                        .HasColumnType("INTEGER");
+
+                    b.Property<int>("timePlayed")
+                        .HasColumnType("INTEGER");
+
+                    b.HasKey("playerId");
+
+                    b.ToTable("Players");
+                });
+
+            modelBuilder.Entity("DataBase.Entity.Chat", b =>
+                {
+                    b.HasOne("DataBase.Entity.Player", "PlayerRecipient")
+                        .WithMany()
+                        .HasForeignKey("recipient")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.HasOne("DataBase.Entity.Player", "PlayerSender")
+                        .WithMany()
+                        .HasForeignKey("sender")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.Navigation("PlayerRecipient");
+
+                    b.Navigation("PlayerSender");
+                });
+
+            modelBuilder.Entity("DataBase.Entity.Game", b =>
+                {
+                    b.HasOne("DataBase.Entity.Player", "PlayerLoser")
+                        .WithMany()
+                        .HasForeignKey("loser")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.HasOne("DataBase.Entity.Player", "PlayerWinner")
+                        .WithMany()
+                        .HasForeignKey("winner")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.Navigation("PlayerLoser");
+
+                    b.Navigation("PlayerWinner");
+                });
+
+            modelBuilder.Entity("DataBase.Entity.Message", b =>
+                {
+                    b.HasOne("DataBase.Entity.Chat", "ChatId")
+                        .WithMany()
+                        .HasForeignKey("chat")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.HasOne("DataBase.Entity.Player", "PlayerId")
+                        .WithMany()
+                        .HasForeignKey("player")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.Navigation("ChatId");
+
+                    b.Navigation("PlayerId");
+                });
+#pragma warning restore 612, 618
+        }
+    }
+}
diff --git a/code/server/DataBase/Migrations/20230216153344_initMigration.cs b/code/server/DataBase/Migrations/20230216153344_initMigration.cs
new file mode 100644
index 0000000..4e28989
--- /dev/null
+++ b/code/server/DataBase/Migrations/20230216153344_initMigration.cs
@@ -0,0 +1,158 @@
+using System;
+using Microsoft.EntityFrameworkCore.Migrations;
+
+#nullable disable
+
+namespace DataBase.Migrations
+{
+    /// <inheritdoc />
+    public partial class initMigration : Migration
+    {
+        /// <inheritdoc />
+        protected override void Up(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.CreateTable(
+                name: "Players",
+                columns: table => new
+                {
+                    playerId = table.Column<int>(type: "INTEGER", nullable: false)
+                        .Annotation("Sqlite:Autoincrement", true),
+                    name = table.Column<string>(type: "TEXT", nullable: false),
+                    nbBallTouchTotal = table.Column<int>(type: "INTEGER", nullable: false),
+                    timePlayed = table.Column<int>(type: "INTEGER", nullable: false)
+                },
+                constraints: table =>
+                {
+                    table.PrimaryKey("PK_Players", x => x.playerId);
+                });
+
+            migrationBuilder.CreateTable(
+                name: "Chats",
+                columns: table => new
+                {
+                    chatId = table.Column<int>(type: "INTEGER", nullable: false)
+                        .Annotation("Sqlite:Autoincrement", true),
+                    sender = table.Column<int>(type: "INTEGER", nullable: false),
+                    recipient = table.Column<int>(type: "INTEGER", nullable: false)
+                },
+                constraints: table =>
+                {
+                    table.PrimaryKey("PK_Chats", x => x.chatId);
+                    table.ForeignKey(
+                        name: "FK_Chats_Players_recipient",
+                        column: x => x.recipient,
+                        principalTable: "Players",
+                        principalColumn: "playerId",
+                        onDelete: ReferentialAction.Cascade);
+                    table.ForeignKey(
+                        name: "FK_Chats_Players_sender",
+                        column: x => x.sender,
+                        principalTable: "Players",
+                        principalColumn: "playerId",
+                        onDelete: ReferentialAction.Cascade);
+                });
+
+            migrationBuilder.CreateTable(
+                name: "Games",
+                columns: table => new
+                {
+                    gameId = table.Column<int>(type: "INTEGER", nullable: false)
+                        .Annotation("Sqlite:Autoincrement", true),
+                    durationGame = table.Column<int>(type: "INTEGER", nullable: false),
+                    nbMaxEchanges = table.Column<int>(type: "INTEGER", nullable: false),
+                    winner = table.Column<int>(type: "INTEGER", nullable: false),
+                    loser = table.Column<int>(type: "INTEGER", nullable: false)
+                },
+                constraints: table =>
+                {
+                    table.PrimaryKey("PK_Games", x => x.gameId);
+                    table.ForeignKey(
+                        name: "FK_Games_Players_loser",
+                        column: x => x.loser,
+                        principalTable: "Players",
+                        principalColumn: "playerId",
+                        onDelete: ReferentialAction.Cascade);
+                    table.ForeignKey(
+                        name: "FK_Games_Players_winner",
+                        column: x => x.winner,
+                        principalTable: "Players",
+                        principalColumn: "playerId",
+                        onDelete: ReferentialAction.Cascade);
+                });
+
+            migrationBuilder.CreateTable(
+                name: "Messages",
+                columns: table => new
+                {
+                    messageId = table.Column<int>(type: "INTEGER", nullable: false)
+                        .Annotation("Sqlite:Autoincrement", true),
+                    message = table.Column<string>(type: "TEXT", nullable: false),
+                    timestamp = table.Column<TimeSpan>(type: "TEXT", nullable: false),
+                    player = table.Column<int>(type: "INTEGER", nullable: false),
+                    chat = table.Column<int>(type: "INTEGER", nullable: false)
+                },
+                constraints: table =>
+                {
+                    table.PrimaryKey("PK_Messages", x => x.messageId);
+                    table.ForeignKey(
+                        name: "FK_Messages_Chats_chat",
+                        column: x => x.chat,
+                        principalTable: "Chats",
+                        principalColumn: "chatId",
+                        onDelete: ReferentialAction.Cascade);
+                    table.ForeignKey(
+                        name: "FK_Messages_Players_player",
+                        column: x => x.player,
+                        principalTable: "Players",
+                        principalColumn: "playerId",
+                        onDelete: ReferentialAction.Cascade);
+                });
+
+            migrationBuilder.CreateIndex(
+                name: "IX_Chats_recipient",
+                table: "Chats",
+                column: "recipient");
+
+            migrationBuilder.CreateIndex(
+                name: "IX_Chats_sender",
+                table: "Chats",
+                column: "sender");
+
+            migrationBuilder.CreateIndex(
+                name: "IX_Games_loser",
+                table: "Games",
+                column: "loser");
+
+            migrationBuilder.CreateIndex(
+                name: "IX_Games_winner",
+                table: "Games",
+                column: "winner");
+
+            migrationBuilder.CreateIndex(
+                name: "IX_Messages_chat",
+                table: "Messages",
+                column: "chat");
+
+            migrationBuilder.CreateIndex(
+                name: "IX_Messages_player",
+                table: "Messages",
+                column: "player");
+        }
+
+        /// <inheritdoc />
+        protected override void Down(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.DropTable(
+                name: "Games");
+
+            migrationBuilder.DropTable(
+                name: "Messages");
+
+            migrationBuilder.DropTable(
+                name: "Chats");
+
+            migrationBuilder.DropTable(
+                name: "Players");
+        }
+    }
+}
diff --git a/code/server/DataBase/PongDB.db b/code/server/DataBase/PongDB.db
index ebf1b1d..a920ea8 100644
Binary files a/code/server/DataBase/PongDB.db and b/code/server/DataBase/PongDB.db differ
diff --git a/code/server/DataBase/PongDbContext.cs b/code/server/DataBase/PongDbContext.cs
index 50fbf6a..233b597 100644
--- a/code/server/DataBase/PongDbContext.cs
+++ b/code/server/DataBase/PongDbContext.cs
@@ -1,13 +1,18 @@
-using Microsoft.EntityFrameworkCore;
+using DataBase.Entity;
+using Microsoft.EntityFrameworkCore;
 
 namespace DataBase
 {
     public class PongDbContext : DbContext
     {
+        DbSet<Player> Players { get; set; }
+        DbSet<Game> Games { get; set; }
+        DbSet<Message> Messages { get; set; }
+        DbSet<Chat> Chats { get; set; }
+
         public PongDbContext() { }
         public PongDbContext(DbContextOptions<PongDbContext> options) : base(options) { }
 
-
         protected override void OnConfiguring(DbContextOptionsBuilder optionsBuilder)
         {
             //base.OnConfiguring(optionsBuilder);
diff --git a/code/server/DataBase/PongDbContextWithStub.cs b/code/server/DataBase/PongDbContextWithStub.cs
new file mode 100644
index 0000000..f902687
--- /dev/null
+++ b/code/server/DataBase/PongDbContextWithStub.cs
@@ -0,0 +1,13 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace DataBase
+{
+    public class PongDbContextWithStub : PongDbContext
+    {
+
+    }
+}