diff --git a/Knots/Endpoints/Discussion/CreateGroupDiscussionEndpoint.cs b/Knots/Endpoints/Discussion/CreateGroupDiscussionEndpoint.cs
new file mode 100644
index 0000000..b8a0201
--- /dev/null
+++ b/Knots/Endpoints/Discussion/CreateGroupDiscussionEndpoint.cs
@@ -0,0 +1,75 @@
+using FastEndpoints;
+using Knots.DTO.Discussion;
+using Knots.Models;
+using Microsoft.EntityFrameworkCore;
+using System.Security.Claims;
+
+namespace Knots.Endpoints.Discussion;
+
+public class CreateGroupDiscussionEndpoint(KnotsDbContext db)
+    : Endpoint<CreateGroupDiscussionRequest, GetDiscussionDto>
+{
+    public override void Configure()
+    {
+        Post("/discussions/group");
+    }
+
+    public override async Task HandleAsync(CreateGroupDiscussionRequest req, CancellationToken ct)
+    {
+        int currentUserId = int.Parse(User.FindFirstValue(ClaimTypes.NameIdentifier)!);
+
+        
+        if (req.Usernames == null || req.Usernames.Count == 0)
+        {
+            await SendErrorsAsync(400, ct);
+            return;
+        }
+
+        
+        List<Models.User> targets = await db.Users
+            .Where(u => req.Usernames.Contains(u.Username!))
+            .ToListAsync(ct);
+
+        if (targets.Count != req.Usernames.Count)
+        {
+            await SendNotFoundAsync(ct); // un ou plusieurs utilisateurs introuvables
+            return;
+        }
+
+        if (targets.Any(t => t.Id == currentUserId))
+        {
+            await SendErrorsAsync(400, ct); // pas de discussion avec soi-même
+            return;
+        }
+
+        
+        List<UserDiscussion> members = targets
+            .Select(t => new UserDiscussion { UserId = t.Id })
+            .ToList();
+
+        members.Add(new UserDiscussion { UserId = currentUserId });
+
+        Models.Discussion discussion = new()
+        {
+            IsGroup = true,
+            UserDiscussions = members
+        };
+
+        db.Discussions.Add(discussion);
+        await db.SaveChangesAsync(ct);
+
+        await SendOkAsync(new GetDiscussionDto
+        {
+            Id = discussion.Id,
+            IsGroup = true,
+            Name = req.GroupName,
+            MembersCount = members.Count
+        }, ct);
+    }
+}
+
+public class CreateGroupDiscussionRequest
+{
+    public string GroupName { get; set; } = "";
+    public List<string> Usernames { get; set; } = [];
+}
\ No newline at end of file
diff --git a/Knots/Migrations/20260610204450_Discussion.Designer.cs b/Knots/Migrations/20260610204450_Discussion.Designer.cs
new file mode 100644
index 0000000..8532d2f
--- /dev/null
+++ b/Knots/Migrations/20260610204450_Discussion.Designer.cs
@@ -0,0 +1,377 @@
+// <auto-generated />
+using System;
+using Knots;
+using Microsoft.EntityFrameworkCore;
+using Microsoft.EntityFrameworkCore.Infrastructure;
+using Microsoft.EntityFrameworkCore.Metadata;
+using Microsoft.EntityFrameworkCore.Migrations;
+using Microsoft.EntityFrameworkCore.Storage.ValueConversion;
+
+#nullable disable
+
+namespace Knots.Migrations
+{
+    [DbContext(typeof(KnotsDbContext))]
+    [Migration("20260610204450_Discussion")]
+    partial class Discussion
+    {
+        /// <inheritdoc />
+        protected override void BuildTargetModel(ModelBuilder modelBuilder)
+        {
+#pragma warning disable 612, 618
+            modelBuilder
+                .HasAnnotation("ProductVersion", "8.0.25")
+                .HasAnnotation("Relational:MaxIdentifierLength", 128);
+
+            SqlServerModelBuilderExtensions.UseIdentityColumns(modelBuilder);
+
+            modelBuilder.Entity("Knots.Models.Discussion", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("int");
+
+                    SqlServerPropertyBuilderExtensions.UseIdentityColumn(b.Property<int>("Id"));
+
+                    b.Property<DateTime>("CreatedAt")
+                        .HasColumnType("datetime2");
+
+                    b.Property<int?>("GroupId")
+                        .HasColumnType("int");
+
+                    b.Property<bool>("IsGroup")
+                        .HasColumnType("bit");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("GroupId");
+
+                    b.ToTable("Discussions");
+                });
+
+            modelBuilder.Entity("Knots.Models.Group", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("int");
+
+                    SqlServerPropertyBuilderExtensions.UseIdentityColumn(b.Property<int>("Id"));
+
+                    b.Property<int>("DiscussionId")
+                        .HasColumnType("int");
+
+                    b.Property<int>("MembersAmount")
+                        .HasColumnType("int");
+
+                    b.Property<string>("Name")
+                        .IsRequired()
+                        .HasMaxLength(50)
+                        .HasColumnType("nvarchar(50)");
+
+                    b.Property<string>("ProfilePicture")
+                        .HasColumnType("nvarchar(max)");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("DiscussionId");
+
+                    b.ToTable("Groups");
+                });
+
+            modelBuilder.Entity("Knots.Models.GroupUser", b =>
+                {
+                    b.Property<int>("GroupId")
+                        .HasColumnType("int");
+
+                    b.Property<int>("UserId")
+                        .HasColumnType("int");
+
+                    b.Property<int?>("RoleId")
+                        .HasColumnType("int");
+
+                    b.HasKey("GroupId", "UserId");
+
+                    b.HasIndex("RoleId");
+
+                    b.HasIndex("UserId");
+
+                    b.ToTable("GroupUsers");
+                });
+
+            modelBuilder.Entity("Knots.Models.Key", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("int");
+
+                    SqlServerPropertyBuilderExtensions.UseIdentityColumn(b.Property<int>("Id"));
+
+                    b.Property<string>("EnKey")
+                        .IsRequired()
+                        .HasMaxLength(50)
+                        .HasColumnType("nvarchar(50)");
+
+                    b.HasKey("Id");
+
+                    b.ToTable("Keys");
+                });
+
+            modelBuilder.Entity("Knots.Models.Message", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("int");
+
+                    SqlServerPropertyBuilderExtensions.UseIdentityColumn(b.Property<int>("Id"));
+
+                    b.Property<string>("Contenu")
+                        .IsRequired()
+                        .HasMaxLength(1000)
+                        .HasColumnType("nvarchar(1000)");
+
+                    b.Property<DateTime>("Date")
+                        .HasColumnType("datetime2");
+
+                    b.Property<int>("DiscussionId")
+                        .HasColumnType("int");
+
+                    b.Property<int?>("GroupId")
+                        .HasColumnType("int");
+
+                    b.Property<int?>("KeyId")
+                        .HasColumnType("int");
+
+                    b.Property<bool>("Type")
+                        .HasColumnType("bit");
+
+                    b.Property<int>("UserId")
+                        .HasColumnType("int");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("DiscussionId");
+
+                    b.HasIndex("GroupId");
+
+                    b.HasIndex("KeyId");
+
+                    b.HasIndex("UserId");
+
+                    b.ToTable("Messages");
+                });
+
+            modelBuilder.Entity("Knots.Models.Role", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("int");
+
+                    SqlServerPropertyBuilderExtensions.UseIdentityColumn(b.Property<int>("Id"));
+
+                    b.Property<string>("Libelle")
+                        .IsRequired()
+                        .HasMaxLength(50)
+                        .HasColumnType("nvarchar(50)");
+
+                    b.HasKey("Id");
+
+                    b.ToTable("Roles");
+                });
+
+            modelBuilder.Entity("Knots.Models.User", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("int");
+
+                    SqlServerPropertyBuilderExtensions.UseIdentityColumn(b.Property<int>("Id"));
+
+                    b.Property<string>("Description")
+                        .HasMaxLength(200)
+                        .HasColumnType("nvarchar(200)");
+
+                    b.Property<string>("Email")
+                        .IsRequired()
+                        .HasMaxLength(70)
+                        .HasColumnType("nvarchar(70)");
+
+                    b.Property<string>("Password")
+                        .IsRequired()
+                        .HasColumnType("nvarchar(max)");
+
+                    b.Property<string>("ProfilePicture")
+                        .HasColumnType("nvarchar(max)");
+
+                    b.Property<int?>("RoleId")
+                        .HasColumnType("int");
+
+                    b.Property<string>("Tel")
+                        .IsRequired()
+                        .HasColumnType("nvarchar(max)");
+
+                    b.Property<string>("Username")
+                        .IsRequired()
+                        .HasMaxLength(50)
+                        .HasColumnType("nvarchar(50)");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("RoleId");
+
+                    b.ToTable("Users");
+                });
+
+            modelBuilder.Entity("Knots.Models.UserDiscussion", b =>
+                {
+                    b.Property<int>("UserId")
+                        .HasColumnType("int");
+
+                    b.Property<int>("DiscussionId")
+                        .HasColumnType("int");
+
+                    b.HasKey("UserId", "DiscussionId");
+
+                    b.HasIndex("DiscussionId");
+
+                    b.ToTable("UserDiscussions");
+                });
+
+            modelBuilder.Entity("Knots.Models.Discussion", b =>
+                {
+                    b.HasOne("Knots.Models.Group", "Group")
+                        .WithMany()
+                        .HasForeignKey("GroupId")
+                        .OnDelete(DeleteBehavior.Restrict);
+
+                    b.Navigation("Group");
+                });
+
+            modelBuilder.Entity("Knots.Models.Group", b =>
+                {
+                    b.HasOne("Knots.Models.Discussion", "Discussion")
+                        .WithMany()
+                        .HasForeignKey("DiscussionId")
+                        .OnDelete(DeleteBehavior.Restrict)
+                        .IsRequired();
+
+                    b.Navigation("Discussion");
+                });
+
+            modelBuilder.Entity("Knots.Models.GroupUser", b =>
+                {
+                    b.HasOne("Knots.Models.Group", "Group")
+                        .WithMany("GroupUsers")
+                        .HasForeignKey("GroupId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.HasOne("Knots.Models.Role", "Role")
+                        .WithMany("GroupUsers")
+                        .HasForeignKey("RoleId");
+
+                    b.HasOne("Knots.Models.User", "User")
+                        .WithMany()
+                        .HasForeignKey("UserId")
+                        .OnDelete(DeleteBehavior.Restrict)
+                        .IsRequired();
+
+                    b.Navigation("Group");
+
+                    b.Navigation("Role");
+
+                    b.Navigation("User");
+                });
+
+            modelBuilder.Entity("Knots.Models.Message", b =>
+                {
+                    b.HasOne("Knots.Models.Discussion", "Discussion")
+                        .WithMany("Messages")
+                        .HasForeignKey("DiscussionId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.HasOne("Knots.Models.Group", "Group")
+                        .WithMany()
+                        .HasForeignKey("GroupId");
+
+                    b.HasOne("Knots.Models.Key", "Key")
+                        .WithMany("Messages")
+                        .HasForeignKey("KeyId");
+
+                    b.HasOne("Knots.Models.User", "User")
+                        .WithMany("Messages")
+                        .HasForeignKey("UserId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.Navigation("Discussion");
+
+                    b.Navigation("Group");
+
+                    b.Navigation("Key");
+
+                    b.Navigation("User");
+                });
+
+            modelBuilder.Entity("Knots.Models.User", b =>
+                {
+                    b.HasOne("Knots.Models.Role", "Role")
+                        .WithMany("Users")
+                        .HasForeignKey("RoleId");
+
+                    b.Navigation("Role");
+                });
+
+            modelBuilder.Entity("Knots.Models.UserDiscussion", b =>
+                {
+                    b.HasOne("Knots.Models.Discussion", "Discussion")
+                        .WithMany("UserDiscussions")
+                        .HasForeignKey("DiscussionId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.HasOne("Knots.Models.User", "User")
+                        .WithMany("UserDiscussions")
+                        .HasForeignKey("UserId")
+                        .OnDelete(DeleteBehavior.Restrict)
+                        .IsRequired();
+
+                    b.Navigation("Discussion");
+
+                    b.Navigation("User");
+                });
+
+            modelBuilder.Entity("Knots.Models.Discussion", b =>
+                {
+                    b.Navigation("Messages");
+
+                    b.Navigation("UserDiscussions");
+                });
+
+            modelBuilder.Entity("Knots.Models.Group", b =>
+                {
+                    b.Navigation("GroupUsers");
+                });
+
+            modelBuilder.Entity("Knots.Models.Key", b =>
+                {
+                    b.Navigation("Messages");
+                });
+
+            modelBuilder.Entity("Knots.Models.Role", b =>
+                {
+                    b.Navigation("GroupUsers");
+
+                    b.Navigation("Users");
+                });
+
+            modelBuilder.Entity("Knots.Models.User", b =>
+                {
+                    b.Navigation("Messages");
+
+                    b.Navigation("UserDiscussions");
+                });
+#pragma warning restore 612, 618
+        }
+    }
+}
diff --git a/Knots/Migrations/20260610204450_Discussion.cs b/Knots/Migrations/20260610204450_Discussion.cs
new file mode 100644
index 0000000..118f5b7
--- /dev/null
+++ b/Knots/Migrations/20260610204450_Discussion.cs
@@ -0,0 +1,170 @@
+using Microsoft.EntityFrameworkCore.Migrations;
+
+#nullable disable
+
+namespace Knots.Migrations
+{
+    /// <inheritdoc />
+    public partial class Discussion : Migration
+    {
+        /// <inheritdoc />
+        protected override void Up(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.DropForeignKey(
+                name: "FK_Groups_Discussions_DiscussionId",
+                table: "Groups");
+
+            migrationBuilder.DropForeignKey(
+                name: "FK_UserDiscussions_Users_UserId",
+                table: "UserDiscussions");
+
+            migrationBuilder.DropIndex(
+                name: "IX_Groups_DiscussionId",
+                table: "Groups");
+
+            migrationBuilder.DropColumn(
+                name: "KeyId",
+                table: "Groups");
+
+            migrationBuilder.AddColumn<int>(
+                name: "GroupId",
+                table: "Discussions",
+                type: "int",
+                nullable: true);
+
+            migrationBuilder.CreateTable(
+                name: "GroupUsers",
+                columns: table => new
+                {
+                    GroupId = table.Column<int>(type: "int", nullable: false),
+                    UserId = table.Column<int>(type: "int", nullable: false),
+                    RoleId = table.Column<int>(type: "int", nullable: true)
+                },
+                constraints: table =>
+                {
+                    table.PrimaryKey("PK_GroupUsers", x => new { x.GroupId, x.UserId });
+                    table.ForeignKey(
+                        name: "FK_GroupUsers_Groups_GroupId",
+                        column: x => x.GroupId,
+                        principalTable: "Groups",
+                        principalColumn: "Id",
+                        onDelete: ReferentialAction.Cascade);
+                    table.ForeignKey(
+                        name: "FK_GroupUsers_Roles_RoleId",
+                        column: x => x.RoleId,
+                        principalTable: "Roles",
+                        principalColumn: "Id");
+                    table.ForeignKey(
+                        name: "FK_GroupUsers_Users_UserId",
+                        column: x => x.UserId,
+                        principalTable: "Users",
+                        principalColumn: "Id",
+                        onDelete: ReferentialAction.Restrict);
+                });
+
+            migrationBuilder.CreateIndex(
+                name: "IX_Groups_DiscussionId",
+                table: "Groups",
+                column: "DiscussionId");
+
+            migrationBuilder.CreateIndex(
+                name: "IX_Discussions_GroupId",
+                table: "Discussions",
+                column: "GroupId");
+
+            migrationBuilder.CreateIndex(
+                name: "IX_GroupUsers_RoleId",
+                table: "GroupUsers",
+                column: "RoleId");
+
+            migrationBuilder.CreateIndex(
+                name: "IX_GroupUsers_UserId",
+                table: "GroupUsers",
+                column: "UserId");
+
+            migrationBuilder.AddForeignKey(
+                name: "FK_Discussions_Groups_GroupId",
+                table: "Discussions",
+                column: "GroupId",
+                principalTable: "Groups",
+                principalColumn: "Id",
+                onDelete: ReferentialAction.Restrict);
+
+            migrationBuilder.AddForeignKey(
+                name: "FK_Groups_Discussions_DiscussionId",
+                table: "Groups",
+                column: "DiscussionId",
+                principalTable: "Discussions",
+                principalColumn: "Id",
+                onDelete: ReferentialAction.Restrict);
+
+            migrationBuilder.AddForeignKey(
+                name: "FK_UserDiscussions_Users_UserId",
+                table: "UserDiscussions",
+                column: "UserId",
+                principalTable: "Users",
+                principalColumn: "Id",
+                onDelete: ReferentialAction.Restrict);
+        }
+
+        /// <inheritdoc />
+        protected override void Down(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.DropForeignKey(
+                name: "FK_Discussions_Groups_GroupId",
+                table: "Discussions");
+
+            migrationBuilder.DropForeignKey(
+                name: "FK_Groups_Discussions_DiscussionId",
+                table: "Groups");
+
+            migrationBuilder.DropForeignKey(
+                name: "FK_UserDiscussions_Users_UserId",
+                table: "UserDiscussions");
+
+            migrationBuilder.DropTable(
+                name: "GroupUsers");
+
+            migrationBuilder.DropIndex(
+                name: "IX_Groups_DiscussionId",
+                table: "Groups");
+
+            migrationBuilder.DropIndex(
+                name: "IX_Discussions_GroupId",
+                table: "Discussions");
+
+            migrationBuilder.DropColumn(
+                name: "GroupId",
+                table: "Discussions");
+
+            migrationBuilder.AddColumn<int>(
+                name: "KeyId",
+                table: "Groups",
+                type: "int",
+                nullable: false,
+                defaultValue: 0);
+
+            migrationBuilder.CreateIndex(
+                name: "IX_Groups_DiscussionId",
+                table: "Groups",
+                column: "DiscussionId",
+                unique: true);
+
+            migrationBuilder.AddForeignKey(
+                name: "FK_Groups_Discussions_DiscussionId",
+                table: "Groups",
+                column: "DiscussionId",
+                principalTable: "Discussions",
+                principalColumn: "Id",
+                onDelete: ReferentialAction.Cascade);
+
+            migrationBuilder.AddForeignKey(
+                name: "FK_UserDiscussions_Users_UserId",
+                table: "UserDiscussions",
+                column: "UserId",
+                principalTable: "Users",
+                principalColumn: "Id",
+                onDelete: ReferentialAction.Cascade);
+        }
+    }
+}
diff --git a/Knots/Migrations/KnotsDbContextModelSnapshot.cs b/Knots/Migrations/KnotsDbContextModelSnapshot.cs
index 8e2c6f6..fe01e7e 100644
--- a/Knots/Migrations/KnotsDbContextModelSnapshot.cs
+++ b/Knots/Migrations/KnotsDbContextModelSnapshot.cs
@@ -33,11 +33,16 @@ namespace Knots.Migrations
                     b.Property<DateTime>("CreatedAt")
                         .HasColumnType("datetime2");
 
+                    b.Property<int?>("GroupId")
+                        .HasColumnType("int");
+
                     b.Property<bool>("IsGroup")
                         .HasColumnType("bit");
 
                     b.HasKey("Id");
 
+                    b.HasIndex("GroupId");
+
                     b.ToTable("Discussions");
                 });
 
@@ -52,9 +57,6 @@ namespace Knots.Migrations
                     b.Property<int>("DiscussionId")
                         .HasColumnType("int");
 
-                    b.Property<int>("KeyId")
-                        .HasColumnType("int");
-
                     b.Property<int>("MembersAmount")
                         .HasColumnType("int");
 
@@ -68,12 +70,31 @@ namespace Knots.Migrations
 
                     b.HasKey("Id");
 
-                    b.HasIndex("DiscussionId")
-                        .IsUnique();
+                    b.HasIndex("DiscussionId");
 
                     b.ToTable("Groups");
                 });
 
+            modelBuilder.Entity("Knots.Models.GroupUser", b =>
+                {
+                    b.Property<int>("GroupId")
+                        .HasColumnType("int");
+
+                    b.Property<int>("UserId")
+                        .HasColumnType("int");
+
+                    b.Property<int?>("RoleId")
+                        .HasColumnType("int");
+
+                    b.HasKey("GroupId", "UserId");
+
+                    b.HasIndex("RoleId");
+
+                    b.HasIndex("UserId");
+
+                    b.ToTable("GroupUsers");
+                });
+
             modelBuilder.Entity("Knots.Models.Key", b =>
                 {
                     b.Property<int>("Id")
@@ -212,17 +233,52 @@ namespace Knots.Migrations
                     b.ToTable("UserDiscussions");
                 });
 
+            modelBuilder.Entity("Knots.Models.Discussion", b =>
+                {
+                    b.HasOne("Knots.Models.Group", "Group")
+                        .WithMany()
+                        .HasForeignKey("GroupId")
+                        .OnDelete(DeleteBehavior.Restrict);
+
+                    b.Navigation("Group");
+                });
+
             modelBuilder.Entity("Knots.Models.Group", b =>
                 {
                     b.HasOne("Knots.Models.Discussion", "Discussion")
-                        .WithOne("Group")
-                        .HasForeignKey("Knots.Models.Group", "DiscussionId")
-                        .OnDelete(DeleteBehavior.Cascade)
+                        .WithMany()
+                        .HasForeignKey("DiscussionId")
+                        .OnDelete(DeleteBehavior.Restrict)
                         .IsRequired();
 
                     b.Navigation("Discussion");
                 });
 
+            modelBuilder.Entity("Knots.Models.GroupUser", b =>
+                {
+                    b.HasOne("Knots.Models.Group", "Group")
+                        .WithMany("GroupUsers")
+                        .HasForeignKey("GroupId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.HasOne("Knots.Models.Role", "Role")
+                        .WithMany("GroupUsers")
+                        .HasForeignKey("RoleId");
+
+                    b.HasOne("Knots.Models.User", "User")
+                        .WithMany()
+                        .HasForeignKey("UserId")
+                        .OnDelete(DeleteBehavior.Restrict)
+                        .IsRequired();
+
+                    b.Navigation("Group");
+
+                    b.Navigation("Role");
+
+                    b.Navigation("User");
+                });
+
             modelBuilder.Entity("Knots.Models.Message", b =>
                 {
                     b.HasOne("Knots.Models.Discussion", "Discussion")
@@ -274,7 +330,7 @@ namespace Knots.Migrations
                     b.HasOne("Knots.Models.User", "User")
                         .WithMany("UserDiscussions")
                         .HasForeignKey("UserId")
-                        .OnDelete(DeleteBehavior.Cascade)
+                        .OnDelete(DeleteBehavior.Restrict)
                         .IsRequired();
 
                     b.Navigation("Discussion");
@@ -284,13 +340,16 @@ namespace Knots.Migrations
 
             modelBuilder.Entity("Knots.Models.Discussion", b =>
                 {
-                    b.Navigation("Group");
-
                     b.Navigation("Messages");
 
                     b.Navigation("UserDiscussions");
                 });
 
+            modelBuilder.Entity("Knots.Models.Group", b =>
+                {
+                    b.Navigation("GroupUsers");
+                });
+
             modelBuilder.Entity("Knots.Models.Key", b =>
                 {
                     b.Navigation("Messages");
@@ -298,6 +357,8 @@ namespace Knots.Migrations
 
             modelBuilder.Entity("Knots.Models.Role", b =>
                 {
+                    b.Navigation("GroupUsers");
+
                     b.Navigation("Users");
                 });
 
diff --git a/Knots/obj/Debug/net8.0/Knots.GeneratedMSBuildEditorConfig.editorconfig b/Knots/obj/Debug/net8.0/Knots.GeneratedMSBuildEditorConfig.editorconfig
index 394100a..ee2a627 100644
--- a/Knots/obj/Debug/net8.0/Knots.GeneratedMSBuildEditorConfig.editorconfig
+++ b/Knots/obj/Debug/net8.0/Knots.GeneratedMSBuildEditorConfig.editorconfig
@@ -9,11 +9,11 @@ build_property.EnforceExtendedAnalyzerRules =
 build_property._SupportedPlatformList = Linux,macOS,Windows
 build_property.RootNamespace = Knots
 build_property.RootNamespace = Knots
-build_property.ProjectDir = C:\Users\dogge\RiderProjects\Knots\Knots\
+build_property.ProjectDir = C:\Users\Carte\RiderProjects\Knots\Knots\
 build_property.EnableComHosting = 
 build_property.EnableGeneratedComInterfaceComImportInterop = 
 build_property.RazorLangVersion = 8.0
 build_property.SupportLocalizedComponentNames = 
 build_property.GenerateRazorMetadataSourceChecksumAttributes = 
-build_property.MSBuildProjectDirectory = C:\Users\dogge\RiderProjects\Knots\Knots
+build_property.MSBuildProjectDirectory = C:\Users\Carte\RiderProjects\Knots\Knots
 build_property._RazorSourceGeneratorDebug = 
diff --git a/Knots/obj/Debug/net8.0/Knots.assets.cache b/Knots/obj/Debug/net8.0/Knots.assets.cache
index 0553df8..07e6e43 100644
Binary files a/Knots/obj/Debug/net8.0/Knots.assets.cache and b/Knots/obj/Debug/net8.0/Knots.assets.cache differ
diff --git a/Knots/obj/Debug/net8.0/Knots.csproj.AssemblyReference.cache b/Knots/obj/Debug/net8.0/Knots.csproj.AssemblyReference.cache
index 28e1702..05c6837 100644
Binary files a/Knots/obj/Debug/net8.0/Knots.csproj.AssemblyReference.cache and b/Knots/obj/Debug/net8.0/Knots.csproj.AssemblyReference.cache differ
diff --git a/Knots/obj/Debug/net8.0/Knots.csproj.CoreCompileInputs.cache b/Knots/obj/Debug/net8.0/Knots.csproj.CoreCompileInputs.cache
index 0fa5dd6..a324c35 100644
--- a/Knots/obj/Debug/net8.0/Knots.csproj.CoreCompileInputs.cache
+++ b/Knots/obj/Debug/net8.0/Knots.csproj.CoreCompileInputs.cache
@@ -1 +1 @@
-6d81524a9696a2a29dec0559b34bd3de07ab63fb29f6715a73a1a90d0d537613
+053df2e2d5f4b0376cb8e5b4fed7175ebe09f3e8d3a4d8035c42b5a7de1f17a9
diff --git a/Knots/obj/Debug/net8.0/Knots.genruntimeconfig.cache b/Knots/obj/Debug/net8.0/Knots.genruntimeconfig.cache
index 16f6a8e..485d9cc 100644
--- a/Knots/obj/Debug/net8.0/Knots.genruntimeconfig.cache
+++ b/Knots/obj/Debug/net8.0/Knots.genruntimeconfig.cache
@@ -1 +1 @@
-2a517ff3e626fe122f9253056129ac168f6d5d47ce545c1f8a40a45a4c220257
+a8415ff929068fa8f2ff3412a5ec6274995459d8b2f0bd67ac17c8c58e30ac97
diff --git a/Knots/obj/Knots.csproj.nuget.dgspec.json b/Knots/obj/Knots.csproj.nuget.dgspec.json
index 580d64e..b5c5a8e 100644
--- a/Knots/obj/Knots.csproj.nuget.dgspec.json
+++ b/Knots/obj/Knots.csproj.nuget.dgspec.json
@@ -1,23 +1,23 @@
 {
   "format": 1,
   "restore": {
-    "C:\\Users\\dogge\\RiderProjects\\Knots\\Knots\\Knots.csproj": {}
+    "C:\\Users\\Carte\\RiderProjects\\Knots\\Knots\\Knots.csproj": {}
   },
   "projects": {
-    "C:\\Users\\dogge\\RiderProjects\\Knots\\Knots\\Knots.csproj": {
+    "C:\\Users\\Carte\\RiderProjects\\Knots\\Knots\\Knots.csproj": {
       "version": "1.0.0",
       "restore": {
-        "projectUniqueName": "C:\\Users\\dogge\\RiderProjects\\Knots\\Knots\\Knots.csproj",
+        "projectUniqueName": "C:\\Users\\Carte\\RiderProjects\\Knots\\Knots\\Knots.csproj",
         "projectName": "Knots",
-        "projectPath": "C:\\Users\\dogge\\RiderProjects\\Knots\\Knots\\Knots.csproj",
-        "packagesPath": "C:\\Users\\dogge\\.nuget\\packages\\",
-        "outputPath": "C:\\Users\\dogge\\RiderProjects\\Knots\\Knots\\obj\\",
+        "projectPath": "C:\\Users\\Carte\\RiderProjects\\Knots\\Knots\\Knots.csproj",
+        "packagesPath": "C:\\Users\\Carte\\.nuget\\packages\\",
+        "outputPath": "C:\\Users\\Carte\\RiderProjects\\Knots\\Knots\\obj\\",
         "projectStyle": "PackageReference",
         "fallbackFolders": [
           "C:\\Program Files (x86)\\Microsoft Visual Studio\\Shared\\NuGetPackages"
         ],
         "configFilePaths": [
-          "C:\\Users\\dogge\\AppData\\Roaming\\NuGet\\NuGet.Config",
+          "C:\\Users\\Carte\\AppData\\Roaming\\NuGet\\NuGet.Config",
           "C:\\Program Files (x86)\\NuGet\\Config\\Microsoft.VisualStudio.FallbackLocation.config",
           "C:\\Program Files (x86)\\NuGet\\Config\\Microsoft.VisualStudio.Offline.config"
         ],
@@ -119,7 +119,7 @@
               "privateAssets": "all"
             }
           },
-          "runtimeIdentifierGraphPath": "C:\\Users\\dogge\\.dotnet\\sdk\\8.0.421/PortableRuntimeIdentifierGraph.json"
+          "runtimeIdentifierGraphPath": "C:\\Users\\Carte\\.dotnet\\sdk\\8.0.421/PortableRuntimeIdentifierGraph.json"
         }
       }
     }
diff --git a/Knots/obj/Knots.csproj.nuget.g.props b/Knots/obj/Knots.csproj.nuget.g.props
index c0b3fbc..5bad3e2 100644
--- a/Knots/obj/Knots.csproj.nuget.g.props
+++ b/Knots/obj/Knots.csproj.nuget.g.props
@@ -5,12 +5,12 @@
     <RestoreTool Condition=" '$(RestoreTool)' == '' ">NuGet</RestoreTool>
     <ProjectAssetsFile Condition=" '$(ProjectAssetsFile)' == '' ">$(MSBuildThisFileDirectory)project.assets.json</ProjectAssetsFile>
     <NuGetPackageRoot Condition=" '$(NuGetPackageRoot)' == '' ">$(UserProfile)\.nuget\packages\</NuGetPackageRoot>
-    <NuGetPackageFolders Condition=" '$(NuGetPackageFolders)' == '' ">C:\Users\dogge\.nuget\packages\;C:\Program Files (x86)\Microsoft Visual Studio\Shared\NuGetPackages</NuGetPackageFolders>
+    <NuGetPackageFolders Condition=" '$(NuGetPackageFolders)' == '' ">C:\Users\Carte\.nuget\packages\;C:\Program Files (x86)\Microsoft Visual Studio\Shared\NuGetPackages</NuGetPackageFolders>
     <NuGetProjectStyle Condition=" '$(NuGetProjectStyle)' == '' ">PackageReference</NuGetProjectStyle>
     <NuGetToolVersion Condition=" '$(NuGetToolVersion)' == '' ">7.0.0</NuGetToolVersion>
   </PropertyGroup>
   <ItemGroup Condition=" '$(ExcludeRestorePackageImports)' != 'true' ">
-    <SourceRoot Include="C:\Users\dogge\.nuget\packages\" />
+    <SourceRoot Include="C:\Users\Carte\.nuget\packages\" />
     <SourceRoot Include="C:\Program Files (x86)\Microsoft Visual Studio\Shared\NuGetPackages\" />
   </ItemGroup>
   <ImportGroup Condition=" '$(ExcludeRestorePackageImports)' != 'true' ">
@@ -20,7 +20,7 @@
     <Import Project="$(NuGetPackageRoot)microsoft.entityframeworkcore.design\8.0.25\build\net8.0\Microsoft.EntityFrameworkCore.Design.props" Condition="Exists('$(NuGetPackageRoot)microsoft.entityframeworkcore.design\8.0.25\build\net8.0\Microsoft.EntityFrameworkCore.Design.props')" />
   </ImportGroup>
   <PropertyGroup Condition=" '$(ExcludeRestorePackageImports)' != 'true' ">
-    <PkgMicrosoft_Extensions_ApiDescription_Server Condition=" '$(PkgMicrosoft_Extensions_ApiDescription_Server)' == '' ">C:\Users\dogge\.nuget\packages\microsoft.extensions.apidescription.server\8.0.0</PkgMicrosoft_Extensions_ApiDescription_Server>
-    <PkgMicrosoft_CodeAnalysis_Analyzers Condition=" '$(PkgMicrosoft_CodeAnalysis_Analyzers)' == '' ">C:\Users\dogge\.nuget\packages\microsoft.codeanalysis.analyzers\3.3.3</PkgMicrosoft_CodeAnalysis_Analyzers>
+    <PkgMicrosoft_Extensions_ApiDescription_Server Condition=" '$(PkgMicrosoft_Extensions_ApiDescription_Server)' == '' ">C:\Users\Carte\.nuget\packages\microsoft.extensions.apidescription.server\8.0.0</PkgMicrosoft_Extensions_ApiDescription_Server>
+    <PkgMicrosoft_CodeAnalysis_Analyzers Condition=" '$(PkgMicrosoft_CodeAnalysis_Analyzers)' == '' ">C:\Users\Carte\.nuget\packages\microsoft.codeanalysis.analyzers\3.3.3</PkgMicrosoft_CodeAnalysis_Analyzers>
   </PropertyGroup>
 </Project>
\ No newline at end of file
diff --git a/Knots/obj/project.assets.json b/Knots/obj/project.assets.json
index d171d9f..7d30d1e 100644
--- a/Knots/obj/project.assets.json
+++ b/Knots/obj/project.assets.json
@@ -6120,23 +6120,23 @@
     ]
   },
   "packageFolders": {
-    "C:\\Users\\dogge\\.nuget\\packages\\": {},
+    "C:\\Users\\Carte\\.nuget\\packages\\": {},
     "C:\\Program Files (x86)\\Microsoft Visual Studio\\Shared\\NuGetPackages": {}
   },
   "project": {
     "version": "1.0.0",
     "restore": {
-      "projectUniqueName": "C:\\Users\\dogge\\RiderProjects\\Knots\\Knots\\Knots.csproj",
+      "projectUniqueName": "C:\\Users\\Carte\\RiderProjects\\Knots\\Knots\\Knots.csproj",
       "projectName": "Knots",
-      "projectPath": "C:\\Users\\dogge\\RiderProjects\\Knots\\Knots\\Knots.csproj",
-      "packagesPath": "C:\\Users\\dogge\\.nuget\\packages\\",
-      "outputPath": "C:\\Users\\dogge\\RiderProjects\\Knots\\Knots\\obj\\",
+      "projectPath": "C:\\Users\\Carte\\RiderProjects\\Knots\\Knots\\Knots.csproj",
+      "packagesPath": "C:\\Users\\Carte\\.nuget\\packages\\",
+      "outputPath": "C:\\Users\\Carte\\RiderProjects\\Knots\\Knots\\obj\\",
       "projectStyle": "PackageReference",
       "fallbackFolders": [
         "C:\\Program Files (x86)\\Microsoft Visual Studio\\Shared\\NuGetPackages"
       ],
       "configFilePaths": [
-        "C:\\Users\\dogge\\AppData\\Roaming\\NuGet\\NuGet.Config",
+        "C:\\Users\\Carte\\AppData\\Roaming\\NuGet\\NuGet.Config",
         "C:\\Program Files (x86)\\NuGet\\Config\\Microsoft.VisualStudio.FallbackLocation.config",
         "C:\\Program Files (x86)\\NuGet\\Config\\Microsoft.VisualStudio.Offline.config"
       ],
@@ -6238,7 +6238,7 @@
             "privateAssets": "all"
           }
         },
-        "runtimeIdentifierGraphPath": "C:\\Users\\dogge\\.dotnet\\sdk\\8.0.421/PortableRuntimeIdentifierGraph.json"
+        "runtimeIdentifierGraphPath": "C:\\Users\\Carte\\.dotnet\\sdk\\8.0.421/PortableRuntimeIdentifierGraph.json"
       }
     }
   }