diff --git a/BeReadyBackend/Migrations/20260514131334_AddedMissingRelations.Designer.cs b/BeReadyBackend/Migrations/20260514131334_AddedMissingRelations.Designer.cs
new file mode 100644
index 0000000..d9f256e
--- /dev/null
+++ b/BeReadyBackend/Migrations/20260514131334_AddedMissingRelations.Designer.cs
@@ -0,0 +1,506 @@
+// <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("20260514131334_AddedMissingRelations")]
+    partial class AddedMissingRelations
+    {
+        /// <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>("Label")
+                        .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.Post", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("int");
+
+                    SqlServerPropertyBuilderExtensions.UseIdentityColumn(b.Property<int>("Id"));
+
+                    b.Property<DateTime>("CreationDate")
+                        .HasColumnType("datetime2");
+
+                    b.Property<string>("Libelle")
+                        .HasColumnType("nvarchar(max)");
+
+                    b.Property<int>("Likes")
+                        .HasColumnType("int");
+
+                    b.Property<int>("RandomChallengeId")
+                        .HasColumnType("int");
+
+                    b.Property<int>("UserId")
+                        .HasColumnType("int");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("RandomChallengeId");
+
+                    b.HasIndex("UserId");
+
+                    b.ToTable("Posts");
+                });
+
+            modelBuilder.Entity("BeReadyBackend.Models.RandomChallenge", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("int");
+
+                    SqlServerPropertyBuilderExtensions.UseIdentityColumn(b.Property<int>("Id"));
+
+                    b.Property<DateTime?>("GeneratedAt")
+                        .HasColumnType("datetime2");
+
+                    b.Property<bool>("IsAlreadyPast")
+                        .HasColumnType("bit");
+
+                    b.Property<string>("Label")
+                        .IsRequired()
+                        .HasColumnType("nvarchar(max)");
+
+                    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()
+                        .HasColumnType("nvarchar(max)");
+
+                    b.Property<string>("Name")
+                        .IsRequired()
+                        .HasColumnType("nvarchar(max)");
+
+                    b.Property<string>("Password")
+                        .IsRequired()
+                        .HasMaxLength(60)
+                        .HasColumnType("nvarchar(60)");
+
+                    b.Property<string>("Salt")
+                        .IsRequired()
+                        .HasColumnType("nvarchar(max)");
+
+                    b.Property<int>("Series")
+                        .HasColumnType("int");
+
+                    b.Property<int>("TotalChallenge")
+                        .HasColumnType("int");
+
+                    b.Property<int>("TotalLikes")
+                        .HasColumnType("int");
+
+                    b.Property<string>("Username")
+                        .IsRequired()
+                        .HasColumnType("nvarchar(max)");
+
+                    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.HasKey("UserId", "GroupId");
+
+                    b.HasIndex("GroupId");
+
+                    b.ToTable("UserGroups");
+                });
+
+            modelBuilder.Entity("BeReadyBackend.Models.UserPost", b =>
+                {
+                    b.Property<int>("UserId")
+                        .HasColumnType("int");
+
+                    b.Property<int>("PostId")
+                        .HasColumnType("int");
+
+                    b.HasKey("UserId", "PostId");
+
+                    b.HasIndex("PostId");
+
+                    b.ToTable("UserPosts");
+                });
+
+            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.Post", b =>
+                {
+                    b.HasOne("BeReadyBackend.Models.RandomChallenge", "RandomChallenge")
+                        .WithMany("Posts")
+                        .HasForeignKey("RandomChallengeId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.HasOne("BeReadyBackend.Models.User", "User")
+                        .WithMany("Posts")
+                        .HasForeignKey("UserId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.Navigation("RandomChallenge");
+
+                    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.UserPost", b =>
+                {
+                    b.HasOne("BeReadyBackend.Models.Post", "Post")
+                        .WithMany("UserPosts")
+                        .HasForeignKey("PostId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.HasOne("BeReadyBackend.Models.User", "User")
+                        .WithMany("UserPosts")
+                        .HasForeignKey("UserId")
+                        .OnDelete(DeleteBehavior.NoAction)
+                        .IsRequired();
+
+                    b.Navigation("Post");
+
+                    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.Post", b =>
+                {
+                    b.Navigation("UserPosts");
+                });
+
+            modelBuilder.Entity("BeReadyBackend.Models.RandomChallenge", b =>
+                {
+                    b.Navigation("Posts");
+
+                    b.Navigation("UserRandomChallenges");
+                });
+
+            modelBuilder.Entity("BeReadyBackend.Models.User", b =>
+                {
+                    b.Navigation("Messages");
+
+                    b.Navigation("Posts");
+
+                    b.Navigation("UserAchievements");
+
+                    b.Navigation("UserFriends");
+
+                    b.Navigation("UserGroups");
+
+                    b.Navigation("UserPosts");
+
+                    b.Navigation("UserRandomChallenges");
+                });
+#pragma warning restore 612, 618
+        }
+    }
+}
diff --git a/BeReadyBackend/Migrations/20260514131334_AddedMissingRelations.cs b/BeReadyBackend/Migrations/20260514131334_AddedMissingRelations.cs
new file mode 100644
index 0000000..dadb495
--- /dev/null
+++ b/BeReadyBackend/Migrations/20260514131334_AddedMissingRelations.cs
@@ -0,0 +1,50 @@
+using Microsoft.EntityFrameworkCore.Migrations;
+
+#nullable disable
+
+namespace BeReadyBackend.Migrations
+{
+    /// <inheritdoc />
+    public partial class AddedMissingRelations : Migration
+    {
+        /// <inheritdoc />
+        protected override void Up(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.AddColumn<int>(
+                name: "RandomChallengeId",
+                table: "Posts",
+                type: "int",
+                nullable: false,
+                defaultValue: 0);
+
+            migrationBuilder.CreateIndex(
+                name: "IX_Posts_RandomChallengeId",
+                table: "Posts",
+                column: "RandomChallengeId");
+
+            migrationBuilder.AddForeignKey(
+                name: "FK_Posts_RandomChallenges_RandomChallengeId",
+                table: "Posts",
+                column: "RandomChallengeId",
+                principalTable: "RandomChallenges",
+                principalColumn: "Id",
+                onDelete: ReferentialAction.Cascade);
+        }
+
+        /// <inheritdoc />
+        protected override void Down(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.DropForeignKey(
+                name: "FK_Posts_RandomChallenges_RandomChallengeId",
+                table: "Posts");
+
+            migrationBuilder.DropIndex(
+                name: "IX_Posts_RandomChallengeId",
+                table: "Posts");
+
+            migrationBuilder.DropColumn(
+                name: "RandomChallengeId",
+                table: "Posts");
+        }
+    }
+}
diff --git a/BeReadyBackend/Migrations/BeReadyDbContextModelSnapshot.cs b/BeReadyBackend/Migrations/BeReadyDbContextModelSnapshot.cs
index 81f1b81..88bfcc2 100644
--- a/BeReadyBackend/Migrations/BeReadyDbContextModelSnapshot.cs
+++ b/BeReadyBackend/Migrations/BeReadyDbContextModelSnapshot.cs
@@ -40,7 +40,7 @@ namespace BeReadyBackend.Migrations
 
                     b.HasKey("Id");
 
-                    b.ToTable("Achievements", (string)null);
+                    b.ToTable("Achievements");
                 });
 
             modelBuilder.Entity("BeReadyBackend.Models.Designation", b =>
@@ -57,7 +57,7 @@ namespace BeReadyBackend.Migrations
 
                     b.HasKey("Id");
 
-                    b.ToTable("Designations", (string)null);
+                    b.ToTable("Designations");
                 });
 
             modelBuilder.Entity("BeReadyBackend.Models.Group", b =>
@@ -77,7 +77,7 @@ namespace BeReadyBackend.Migrations
 
                     b.HasKey("Id");
 
-                    b.ToTable("Groups", (string)null);
+                    b.ToTable("Groups");
                 });
 
             modelBuilder.Entity("BeReadyBackend.Models.Message", b =>
@@ -107,7 +107,7 @@ namespace BeReadyBackend.Migrations
 
                     b.HasIndex("UserId");
 
-                    b.ToTable("Messages", (string)null);
+                    b.ToTable("Messages");
                 });
 
             modelBuilder.Entity("BeReadyBackend.Models.Post", b =>
@@ -127,14 +127,19 @@ namespace BeReadyBackend.Migrations
                     b.Property<int>("Likes")
                         .HasColumnType("int");
 
+                    b.Property<int>("RandomChallengeId")
+                        .HasColumnType("int");
+
                     b.Property<int>("UserId")
                         .HasColumnType("int");
 
                     b.HasKey("Id");
 
+                    b.HasIndex("RandomChallengeId");
+
                     b.HasIndex("UserId");
 
-                    b.ToTable("Posts", (string)null);
+                    b.ToTable("Posts");
                 });
 
             modelBuilder.Entity("BeReadyBackend.Models.RandomChallenge", b =>
@@ -161,7 +166,7 @@ namespace BeReadyBackend.Migrations
 
                     b.HasKey("Id");
 
-                    b.ToTable("RandomChallenges", (string)null);
+                    b.ToTable("RandomChallenges");
                 });
 
             modelBuilder.Entity("BeReadyBackend.Models.User", b =>
@@ -217,7 +222,7 @@ namespace BeReadyBackend.Migrations
 
                     b.HasIndex("DesignationId");
 
-                    b.ToTable("Users", (string)null);
+                    b.ToTable("Users");
                 });
 
             modelBuilder.Entity("BeReadyBackend.Models.UserAchievement", b =>
@@ -232,7 +237,7 @@ namespace BeReadyBackend.Migrations
 
                     b.HasIndex("AchievementId");
 
-                    b.ToTable("UserAchievements", (string)null);
+                    b.ToTable("UserAchievements");
                 });
 
             modelBuilder.Entity("BeReadyBackend.Models.UserFriend", b =>
@@ -250,7 +255,7 @@ namespace BeReadyBackend.Migrations
 
                     b.HasIndex("FriendId");
 
-                    b.ToTable("UserFriends", (string)null);
+                    b.ToTable("UserFriends");
                 });
 
             modelBuilder.Entity("BeReadyBackend.Models.UserGroup", b =>
@@ -269,7 +274,7 @@ namespace BeReadyBackend.Migrations
 
                     b.HasIndex("GroupId");
 
-                    b.ToTable("UserGroups", (string)null);
+                    b.ToTable("UserGroups");
                 });
 
             modelBuilder.Entity("BeReadyBackend.Models.UserPost", b =>
@@ -284,7 +289,7 @@ namespace BeReadyBackend.Migrations
 
                     b.HasIndex("PostId");
 
-                    b.ToTable("UserPosts", (string)null);
+                    b.ToTable("UserPosts");
                 });
 
             modelBuilder.Entity("BeReadyBackend.Models.UserRandomChallenge", b =>
@@ -302,7 +307,7 @@ namespace BeReadyBackend.Migrations
 
                     b.HasIndex("RandomChallengeId");
 
-                    b.ToTable("UserRandomChallenges", (string)null);
+                    b.ToTable("UserRandomChallenges");
                 });
 
             modelBuilder.Entity("BeReadyBackend.Models.Message", b =>
@@ -326,12 +331,20 @@ namespace BeReadyBackend.Migrations
 
             modelBuilder.Entity("BeReadyBackend.Models.Post", b =>
                 {
+                    b.HasOne("BeReadyBackend.Models.RandomChallenge", "RandomChallenge")
+                        .WithMany("Posts")
+                        .HasForeignKey("RandomChallengeId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
                     b.HasOne("BeReadyBackend.Models.User", "User")
                         .WithMany("Posts")
                         .HasForeignKey("UserId")
                         .OnDelete(DeleteBehavior.Cascade)
                         .IsRequired();
 
+                    b.Navigation("RandomChallenge");
+
                     b.Navigation("User");
                 });
 
@@ -463,6 +476,8 @@ namespace BeReadyBackend.Migrations
 
             modelBuilder.Entity("BeReadyBackend.Models.RandomChallenge", b =>
                 {
+                    b.Navigation("Posts");
+
                     b.Navigation("UserRandomChallenges");
                 });
 
diff --git a/BeReadyBackend/Models/Post.cs b/BeReadyBackend/Models/Post.cs
index 75679d1..f7c7284 100644
--- a/BeReadyBackend/Models/Post.cs
+++ b/BeReadyBackend/Models/Post.cs
@@ -11,6 +11,9 @@ public class Post
 
     public User? User { get; set; }
     [Required] public int UserId { get; set; }
+    
+    public RandomChallenge? RandomChallenge { get; set; }
+    [Required] public int RandomChallengeId { get; set; }
 
     public List<UserPost>? UserPosts { get; set; }
 }
\ No newline at end of file
diff --git a/BeReadyBackend/Models/RandomChallenge.cs b/BeReadyBackend/Models/RandomChallenge.cs
index cc84c60..5f21c10 100644
--- a/BeReadyBackend/Models/RandomChallenge.cs
+++ b/BeReadyBackend/Models/RandomChallenge.cs
@@ -12,4 +12,5 @@ public class RandomChallenge
     public DateTime? GeneratedAt { get; set; }
 
     public List<UserRandomChallenge>? UserRandomChallenges { get; set; }
+    public List<Post>? Posts { get; set; }
 }
\ No newline at end of file