diff --git a/Knots/Models/Discussion.cs b/Knots/Models/Discussion.cs
index eb1502b..da7b4b2 100644
--- a/Knots/Models/Discussion.cs
+++ b/Knots/Models/Discussion.cs
@@ -5,4 +5,7 @@ namespace Knots.Models;
 public class Discussion
 {
     [Key] public int Id { get; set; }
+    
+    public List<Message> Messages { get; set; }
+    public Key KeyId { get; set; }
 }
\ No newline at end of file
diff --git a/Knots/Models/Group.cs b/Knots/Models/Group.cs
index 727c91c..3033285 100644
--- a/Knots/Models/Group.cs
+++ b/Knots/Models/Group.cs
@@ -9,4 +9,7 @@ public class Group
     [Required, MaxLength(50)] public string? Name { get; set; }
     [Required] public int MembersAmount { get; set; }
     public string? ProfilePicture { get; set; }
+    public Key KeyId { get; set; }
+    List<Message> Messages { get; set; }
+    List<User> Users { get; set; }
 }
\ No newline at end of file
diff --git a/Knots/Models/Key.cs b/Knots/Models/Key.cs
index f222555..a8a847c 100644
--- a/Knots/Models/Key.cs
+++ b/Knots/Models/Key.cs
@@ -6,4 +6,5 @@ public class Key
 {
     [Key] public int Id { get; set; }
     [Required, MaxLength(50)] public string? EnKey { get; set; }
+    List<Message> Messages { get; set; }
 }
\ No newline at end of file
diff --git a/Knots/Models/Message.cs b/Knots/Models/Message.cs
index 1545670..872eda4 100644
--- a/Knots/Models/Message.cs
+++ b/Knots/Models/Message.cs
@@ -8,4 +8,7 @@ public class Message
     [Required, MaxLength(1000)] public string? Contenu { get; set; }
     [Required] public DateTime Date { get; set; }
     [Required] public Boolean Type { get; set; }
+    public Group Group { get; set; }
+    public Key Key { get; set; }
+    public User User { get; set; }
 }
\ No newline at end of file
diff --git a/Knots/Models/User.cs b/Knots/Models/User.cs
index 7731c58..3937418 100644
--- a/Knots/Models/User.cs
+++ b/Knots/Models/User.cs
@@ -11,4 +11,5 @@ public class User
       [Required, MaxLength(70)] public string? Email { get; set; }
       [Required, Length(10, 10)] public string? Tel { get; set; }
       public string? ProfilePicture { get; set; }
+      public List<Message> Messages { get; set; }
 }
\ No newline at end of file
diff --git a/Knots/Profiles/GroupProfile.cs b/Knots/Profiles/GroupProfile.cs
index 7c02241..723f22a 100644
--- a/Knots/Profiles/GroupProfile.cs
+++ b/Knots/Profiles/GroupProfile.cs
@@ -1,6 +1,15 @@
+using AutoMapper;
+using Knots.DTO.Group;
+using Knots.Models;
+
 namespace Knots.Profiles;
 
-public class GroupProfile
+public class GroupProfile : Profile
 {
-    
+    public GroupProfile()
+    {
+        CreateMap<Group, GetGroupDto>();
+        CreateMap<Group, GetGroupDetailsDto>();
+        CreateMap<CreateGroupDto, Group>();
+    }
 }
\ No newline at end of file