diff --git a/BeReadyBackend/Migrations/20260222115003_AddedMissingFieldInGroupEntity.Designer.cs b/BeReadyBackend/Migrations/20260222115003_AddedMissingFieldInGroupEntity.Designer.cs
new file mode 100644
index 0000000..377e20d
--- /dev/null
+++ b/BeReadyBackend/Migrations/20260222115003_AddedMissingFieldInGroupEntity.Designer.cs
@@ -0,0 +1,442 @@
+// <auto-generated />
+using System;
+using BeReadyBackend;
+using Microsoft.EntityFrameworkCore;
+using Microsoft.EntityFrameworkCore.Infrastructure;
+using Microsoft.EntityFrameworkCore.Metadata;
+using Microsoft.EntityFrameworkCore.Migrations;
+using Microsoft.EntityFrameworkCore.Storage.ValueConversion;
+
+#nullable disable
+
+namespace BeReadyBackend.Migrations
+{
+    [DbContext(typeof(BeReadyDbContext))]
+    [Migration("20260222115003_AddedMissingFieldInGroupEntity")]
+    partial class AddedMissingFieldInGroupEntity
+    {
+        /// <inheritdoc />
+        protected override void BuildTargetModel(ModelBuilder modelBuilder)
+        {
+#pragma warning disable 612, 618
+            modelBuilder
+                .HasAnnotation("ProductVersion", "8.0.20")
+                .HasAnnotation("Relational:MaxIdentifierLength", 128);
+
+            SqlServerModelBuilderExtensions.UseIdentityColumns(modelBuilder);
+
+            modelBuilder.Entity("BeReadyBackend.Models.Achievement", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("int");
+
+                    SqlServerPropertyBuilderExtensions.UseIdentityColumn(b.Property<int>("Id"));
+
+                    b.Property<string>("Description")
+                        .IsRequired()
+                        .HasColumnType("nvarchar(max)");
+
+                    b.Property<string>("Label")
+                        .IsRequired()
+                        .HasColumnType("nvarchar(max)");
+
+                    b.HasKey("Id");
+
+                    b.ToTable("Achievements");
+                });
+
+            modelBuilder.Entity("BeReadyBackend.Models.Designation", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("int");
+
+                    SqlServerPropertyBuilderExtensions.UseIdentityColumn(b.Property<int>("Id"));
+
+                    b.Property<string>("Label")
+                        .IsRequired()
+                        .HasColumnType("nvarchar(max)");
+
+                    b.HasKey("Id");
+
+                    b.ToTable("Designations");
+                });
+
+            modelBuilder.Entity("BeReadyBackend.Models.Group", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("int");
+
+                    SqlServerPropertyBuilderExtensions.UseIdentityColumn(b.Property<int>("Id"));
+
+                    b.Property<DateTime>("CreationDate")
+                        .HasColumnType("datetime2");
+
+                    b.Property<string>("Description")
+                        .IsRequired()
+                        .HasColumnType("nvarchar(max)");
+
+                    b.Property<int>("Duration")
+                        .HasColumnType("int");
+
+                    b.Property<bool>("IsFinished")
+                        .HasColumnType("bit");
+
+                    b.Property<string>("Label")
+                        .IsRequired()
+                        .HasMaxLength(100)
+                        .HasColumnType("nvarchar(100)");
+
+                    b.Property<string>("Title")
+                        .IsRequired()
+                        .HasColumnType("nvarchar(max)");
+
+                    b.HasKey("Id");
+
+                    b.ToTable("Groups");
+                });
+
+            modelBuilder.Entity("BeReadyBackend.Models.Message", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("int");
+
+                    SqlServerPropertyBuilderExtensions.UseIdentityColumn(b.Property<int>("Id"));
+
+                    b.Property<int>("GroupId")
+                        .HasColumnType("int");
+
+                    b.Property<string>("Libelle")
+                        .IsRequired()
+                        .HasColumnType("nvarchar(max)");
+
+                    b.Property<DateTime>("SendDate")
+                        .HasColumnType("datetime2");
+
+                    b.Property<int>("UserId")
+                        .HasColumnType("int");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("GroupId");
+
+                    b.HasIndex("UserId");
+
+                    b.ToTable("Messages");
+                });
+
+            modelBuilder.Entity("BeReadyBackend.Models.RandomChallenge", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("int");
+
+                    SqlServerPropertyBuilderExtensions.UseIdentityColumn(b.Property<int>("Id"));
+
+                    b.Property<int>("Duration")
+                        .HasColumnType("int");
+
+                    b.Property<bool>("IsAlreadyPast")
+                        .HasColumnType("bit");
+
+                    b.Property<string>("Libelle")
+                        .IsRequired()
+                        .HasColumnType("nvarchar(max)");
+
+                    b.HasKey("Id");
+
+                    b.ToTable("RandomChallenges");
+                });
+
+            modelBuilder.Entity("BeReadyBackend.Models.User", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("int");
+
+                    SqlServerPropertyBuilderExtensions.UseIdentityColumn(b.Property<int>("Id"));
+
+                    b.Property<DateTime>("CreationDate")
+                        .HasColumnType("datetime2");
+
+                    b.Property<int?>("DesignationId")
+                        .HasColumnType("int");
+
+                    b.Property<string>("Email")
+                        .IsRequired()
+                        .HasMaxLength(100)
+                        .HasColumnType("nvarchar(100)");
+
+                    b.Property<string>("FirstName")
+                        .IsRequired()
+                        .HasMaxLength(50)
+                        .HasColumnType("nvarchar(50)");
+
+                    b.Property<string>("Name")
+                        .IsRequired()
+                        .HasMaxLength(50)
+                        .HasColumnType("nvarchar(50)");
+
+                    b.Property<string>("Password")
+                        .IsRequired()
+                        .HasMaxLength(60)
+                        .HasColumnType("nvarchar(60)");
+
+                    b.Property<string>("Salt")
+                        .IsRequired()
+                        .HasColumnType("nvarchar(max)");
+
+                    b.Property<int>("Score")
+                        .HasColumnType("int");
+
+                    b.Property<int>("Series")
+                        .HasColumnType("int");
+
+                    b.Property<int>("TotalBonusChallenge")
+                        .HasColumnType("int");
+
+                    b.Property<int>("TotalChallenge")
+                        .HasColumnType("int");
+
+                    b.Property<int>("TotalPodium")
+                        .HasColumnType("int");
+
+                    b.Property<int>("TotalWin")
+                        .HasColumnType("int");
+
+                    b.Property<string>("Username")
+                        .IsRequired()
+                        .HasMaxLength(50)
+                        .HasColumnType("nvarchar(50)");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("DesignationId");
+
+                    b.ToTable("Users");
+                });
+
+            modelBuilder.Entity("BeReadyBackend.Models.UserAchievement", b =>
+                {
+                    b.Property<int>("UserId")
+                        .HasColumnType("int");
+
+                    b.Property<int>("AchievementId")
+                        .HasColumnType("int");
+
+                    b.HasKey("UserId", "AchievementId");
+
+                    b.HasIndex("AchievementId");
+
+                    b.ToTable("UserAchievements");
+                });
+
+            modelBuilder.Entity("BeReadyBackend.Models.UserFriend", b =>
+                {
+                    b.Property<int>("UserId")
+                        .HasColumnType("int");
+
+                    b.Property<int>("FriendId")
+                        .HasColumnType("int");
+
+                    b.Property<bool>("IsAccepted")
+                        .HasColumnType("bit");
+
+                    b.HasKey("UserId", "FriendId");
+
+                    b.HasIndex("FriendId");
+
+                    b.ToTable("UserFriends");
+                });
+
+            modelBuilder.Entity("BeReadyBackend.Models.UserGroup", b =>
+                {
+                    b.Property<int>("UserId")
+                        .HasColumnType("int");
+
+                    b.Property<int>("GroupId")
+                        .HasColumnType("int");
+
+                    b.Property<string>("Grade")
+                        .IsRequired()
+                        .HasColumnType("nvarchar(max)");
+
+                    b.Property<string>("Proof")
+                        .HasColumnType("nvarchar(max)");
+
+                    b.Property<int>("Score")
+                        .HasColumnType("int");
+
+                    b.Property<int?>("VotedProofId")
+                        .HasColumnType("int");
+
+                    b.HasKey("UserId", "GroupId");
+
+                    b.HasIndex("GroupId");
+
+                    b.ToTable("UserGroups");
+                });
+
+            modelBuilder.Entity("BeReadyBackend.Models.UserRandomChallenge", b =>
+                {
+                    b.Property<int>("UserId")
+                        .HasColumnType("int");
+
+                    b.Property<int>("RandomChallengeId")
+                        .HasColumnType("int");
+
+                    b.Property<string>("Proof")
+                        .HasColumnType("nvarchar(max)");
+
+                    b.HasKey("UserId", "RandomChallengeId");
+
+                    b.HasIndex("RandomChallengeId");
+
+                    b.ToTable("UserRandomChallenges");
+                });
+
+            modelBuilder.Entity("BeReadyBackend.Models.Message", b =>
+                {
+                    b.HasOne("BeReadyBackend.Models.Group", "Group")
+                        .WithMany("Messages")
+                        .HasForeignKey("GroupId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.HasOne("BeReadyBackend.Models.User", "User")
+                        .WithMany("Messages")
+                        .HasForeignKey("UserId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.Navigation("Group");
+
+                    b.Navigation("User");
+                });
+
+            modelBuilder.Entity("BeReadyBackend.Models.User", b =>
+                {
+                    b.HasOne("BeReadyBackend.Models.Designation", "Designation")
+                        .WithMany("Users")
+                        .HasForeignKey("DesignationId");
+
+                    b.Navigation("Designation");
+                });
+
+            modelBuilder.Entity("BeReadyBackend.Models.UserAchievement", b =>
+                {
+                    b.HasOne("BeReadyBackend.Models.Achievement", "Achievement")
+                        .WithMany("UserAchievements")
+                        .HasForeignKey("AchievementId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.HasOne("BeReadyBackend.Models.User", "User")
+                        .WithMany("UserAchievements")
+                        .HasForeignKey("UserId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.Navigation("Achievement");
+
+                    b.Navigation("User");
+                });
+
+            modelBuilder.Entity("BeReadyBackend.Models.UserFriend", b =>
+                {
+                    b.HasOne("BeReadyBackend.Models.User", "Friend")
+                        .WithMany()
+                        .HasForeignKey("FriendId")
+                        .OnDelete(DeleteBehavior.Restrict)
+                        .IsRequired();
+
+                    b.HasOne("BeReadyBackend.Models.User", "User")
+                        .WithMany("UserFriends")
+                        .HasForeignKey("UserId")
+                        .OnDelete(DeleteBehavior.Restrict)
+                        .IsRequired();
+
+                    b.Navigation("Friend");
+
+                    b.Navigation("User");
+                });
+
+            modelBuilder.Entity("BeReadyBackend.Models.UserGroup", b =>
+                {
+                    b.HasOne("BeReadyBackend.Models.Group", "Group")
+                        .WithMany("UserGroups")
+                        .HasForeignKey("GroupId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.HasOne("BeReadyBackend.Models.User", "User")
+                        .WithMany("UserGroups")
+                        .HasForeignKey("UserId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.Navigation("Group");
+
+                    b.Navigation("User");
+                });
+
+            modelBuilder.Entity("BeReadyBackend.Models.UserRandomChallenge", b =>
+                {
+                    b.HasOne("BeReadyBackend.Models.RandomChallenge", "RandomChallenge")
+                        .WithMany("UserRandomChallenges")
+                        .HasForeignKey("RandomChallengeId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.HasOne("BeReadyBackend.Models.User", "User")
+                        .WithMany("UserRandomChallenges")
+                        .HasForeignKey("UserId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.Navigation("RandomChallenge");
+
+                    b.Navigation("User");
+                });
+
+            modelBuilder.Entity("BeReadyBackend.Models.Achievement", b =>
+                {
+                    b.Navigation("UserAchievements");
+                });
+
+            modelBuilder.Entity("BeReadyBackend.Models.Designation", b =>
+                {
+                    b.Navigation("Users");
+                });
+
+            modelBuilder.Entity("BeReadyBackend.Models.Group", b =>
+                {
+                    b.Navigation("Messages");
+
+                    b.Navigation("UserGroups");
+                });
+
+            modelBuilder.Entity("BeReadyBackend.Models.RandomChallenge", b =>
+                {
+                    b.Navigation("UserRandomChallenges");
+                });
+
+            modelBuilder.Entity("BeReadyBackend.Models.User", b =>
+                {
+                    b.Navigation("Messages");
+
+                    b.Navigation("UserAchievements");
+
+                    b.Navigation("UserFriends");
+
+                    b.Navigation("UserGroups");
+
+                    b.Navigation("UserRandomChallenges");
+                });
+#pragma warning restore 612, 618
+        }
+    }
+}
diff --git a/BeReadyBackend/Migrations/20260222115003_AddedMissingFieldInGroupEntity.cs b/BeReadyBackend/Migrations/20260222115003_AddedMissingFieldInGroupEntity.cs
new file mode 100644
index 0000000..f0e7604
--- /dev/null
+++ b/BeReadyBackend/Migrations/20260222115003_AddedMissingFieldInGroupEntity.cs
@@ -0,0 +1,22 @@
+using Microsoft.EntityFrameworkCore.Migrations;
+
+#nullable disable
+
+namespace BeReadyBackend.Migrations
+{
+    /// <inheritdoc />
+    public partial class AddedMissingFieldInGroupEntity : Migration
+    {
+        /// <inheritdoc />
+        protected override void Up(MigrationBuilder migrationBuilder)
+        {
+
+        }
+
+        /// <inheritdoc />
+        protected override void Down(MigrationBuilder migrationBuilder)
+        {
+
+        }
+    }
+}
diff --git a/BeReadyBackend/Migrations/BeReadyDbContextModelSnapshot.cs b/BeReadyBackend/Migrations/BeReadyDbContextModelSnapshot.cs
index b5b98c0..41ad7c2 100644
--- a/BeReadyBackend/Migrations/BeReadyDbContextModelSnapshot.cs
+++ b/BeReadyBackend/Migrations/BeReadyDbContextModelSnapshot.cs
@@ -364,7 +364,7 @@ namespace BeReadyBackend.Migrations
             modelBuilder.Entity("BeReadyBackend.Models.UserGroup", b =>
                 {
                     b.HasOne("BeReadyBackend.Models.Group", "Group")
-                        .WithMany()
+                        .WithMany("UserGroups")
                         .HasForeignKey("GroupId")
                         .OnDelete(DeleteBehavior.Cascade)
                         .IsRequired();
@@ -412,6 +412,8 @@ namespace BeReadyBackend.Migrations
             modelBuilder.Entity("BeReadyBackend.Models.Group", b =>
                 {
                     b.Navigation("Messages");
+
+                    b.Navigation("UserGroups");
                 });
 
             modelBuilder.Entity("BeReadyBackend.Models.RandomChallenge", b =>
diff --git a/BeReadyBackend/Models/Group.cs b/BeReadyBackend/Models/Group.cs
index 93a4c5c..981d1f4 100644
--- a/BeReadyBackend/Models/Group.cs
+++ b/BeReadyBackend/Models/Group.cs
@@ -14,4 +14,5 @@ public class Group
     [Required] public DateTime CreationDate { get; set; }
     
     public List<Message>? Messages { get; set; }
+    public List<UserGroup>? UserGroups { get; set; }
 }
\ No newline at end of file