diff --git a/Knots/DTO/Group/UpdateGroupNomDto.cs b/Knots/DTO/Group/UpdateGroupNomDto.cs
new file mode 100644
index 0000000..6f6982d
--- /dev/null
+++ b/Knots/DTO/Group/UpdateGroupNomDto.cs
@@ -0,0 +1,6 @@
+namespace Knots.DTO.Group;
+
+public class UpdateGroupNomDto
+{
+    public string? Nom { get; set; }
+}
\ No newline at end of file
diff --git a/Knots/DTO/Group/UpdateGroupNombreMembresDto.cs b/Knots/DTO/Group/UpdateGroupNombreMembresDto.cs
new file mode 100644
index 0000000..55791a9
--- /dev/null
+++ b/Knots/DTO/Group/UpdateGroupNombreMembresDto.cs
@@ -0,0 +1,6 @@
+namespace Knots.DTO.Group;
+
+public class UpdateGroupNombreMembresDto
+{
+    public int NombreMembres { get; set; }
+}
\ No newline at end of file
diff --git a/Knots/DTO/Group/UpdateGroupProfilePictureDto.cs b/Knots/DTO/Group/UpdateGroupProfilePictureDto.cs
new file mode 100644
index 0000000..e40f53c
--- /dev/null
+++ b/Knots/DTO/Group/UpdateGroupProfilePictureDto.cs
@@ -0,0 +1,6 @@
+namespace Knots.DTO.Group;
+
+public class UpdateGroupProfilePictureDto
+{
+    public string? ProfilePicture { get; set; }
+}
\ No newline at end of file
diff --git a/Knots/DTO/User/UpdateUserDescriptionDto.cs b/Knots/DTO/User/UpdateUserDescriptionDto.cs
new file mode 100644
index 0000000..c65d9e6
--- /dev/null
+++ b/Knots/DTO/User/UpdateUserDescriptionDto.cs
@@ -0,0 +1,6 @@
+namespace Knots.DTO.User;
+
+public class UpdateUserDescriptionDto
+{
+    public string? Description {get; set;}
+}
\ No newline at end of file
diff --git a/Knots/DTO/User/UpdateUserEmailDto.cs b/Knots/DTO/User/UpdateUserEmailDto.cs
new file mode 100644
index 0000000..641ecae
--- /dev/null
+++ b/Knots/DTO/User/UpdateUserEmailDto.cs
@@ -0,0 +1,6 @@
+namespace Knots.DTO.User;
+
+public class UpdateUserEmailDto
+{
+    public string? Email { get; set; }
+}
\ No newline at end of file
diff --git a/Knots/DTO/User/UpdateUserPasswordDto.cs b/Knots/DTO/User/UpdateUserPasswordDto.cs
new file mode 100644
index 0000000..83660e0
--- /dev/null
+++ b/Knots/DTO/User/UpdateUserPasswordDto.cs
@@ -0,0 +1,6 @@
+namespace Knots.DTO.User;
+
+public class UpdateUserPasswordDto
+{
+    public string? Password { get; set; }
+}
\ No newline at end of file
diff --git a/Knots/DTO/User/UpdateUserProfilePictureDto.cs b/Knots/DTO/User/UpdateUserProfilePictureDto.cs
new file mode 100644
index 0000000..e84c2d9
--- /dev/null
+++ b/Knots/DTO/User/UpdateUserProfilePictureDto.cs
@@ -0,0 +1,6 @@
+namespace Knots.DTO.User;
+
+public class UpdateUserProfilePictureDto
+{
+    public string? ProfilePicture { get; set; }
+}
\ No newline at end of file
diff --git a/Knots/DTO/User/UpdateUserTelDto.cs b/Knots/DTO/User/UpdateUserTelDto.cs
new file mode 100644
index 0000000..3507bec
--- /dev/null
+++ b/Knots/DTO/User/UpdateUserTelDto.cs
@@ -0,0 +1,6 @@
+namespace Knots.DTO.User;
+
+public class UpdateUserTelDto
+{
+    public string? Tel { get; set; }
+}
\ No newline at end of file
diff --git a/Knots/DTO/User/UpdateUsernameDto.cs b/Knots/DTO/User/UpdateUsernameDto.cs
new file mode 100644
index 0000000..e47da7c
--- /dev/null
+++ b/Knots/DTO/User/UpdateUsernameDto.cs
@@ -0,0 +1,6 @@
+namespace Knots.DTO.User;
+
+public class UpdateUsernameDto
+{
+    public string? Username { get; set; }
+}
\ No newline at end of file
diff --git a/Knots/Validators/Discussion/CreateDiscussionDtoValidator.cs b/Knots/Validators/Discussion/CreateDiscussionDtoValidator.cs
index ba6106d..301076a 100644
--- a/Knots/Validators/Discussion/CreateDiscussionDtoValidator.cs
+++ b/Knots/Validators/Discussion/CreateDiscussionDtoValidator.cs
@@ -1,6 +1,15 @@
+using FastEndpoints;
+using FluentValidation;
+using Knots.DTO.Discussion;
+
 namespace Knots.Validators.Discussion;
 
-public class CreateDiscussionDtoValidator
+public class CreateDiscussionDtoValidator : Validator<CreateDiscussionDto>
 {
-    
+    public CreateDiscussionDtoValidator()
+    {
+        RuleFor(x => x.Id)
+            .NotEmpty()
+            .WithMessage("Id is required");
+    }
 }
\ No newline at end of file
diff --git a/Knots/Validators/Discussion/DeleteDiscussionDtoValidator.cs b/Knots/Validators/Discussion/DeleteDiscussionDtoValidator.cs
index c8f1c64..c03fb56 100644
--- a/Knots/Validators/Discussion/DeleteDiscussionDtoValidator.cs
+++ b/Knots/Validators/Discussion/DeleteDiscussionDtoValidator.cs
@@ -1,6 +1,15 @@
+using FastEndpoints;
+using FluentValidation;
+using Knots.DTO.Discussion;
+
 namespace Knots.Validators.Discussion;
 
-public class DeleteDiscussionDtoValidator
+public class DeleteDiscussionDtoValidator : Validator<DeleteDiscussionDto>
 {
-    
+    public DeleteDiscussionDtoValidator()
+    {
+        RuleFor(x => x.Id)
+            .NotEmpty()
+            .WithMessage("Id is required");
+    }
 }
\ No newline at end of file
diff --git a/Knots/Validators/Discussion/GetDiscussionDtoValidator.cs b/Knots/Validators/Discussion/GetDiscussionDtoValidator.cs
deleted file mode 100644
index c73960f..0000000
--- a/Knots/Validators/Discussion/GetDiscussionDtoValidator.cs
+++ /dev/null
@@ -1,6 +0,0 @@
-namespace Knots.Validators.Discussion;
-
-public class GetDiscussionDtoValidator
-{
-    
-}
\ No newline at end of file
diff --git a/Knots/Validators/Group/CreateGroupDtoValidator.cs b/Knots/Validators/Group/CreateGroupDtoValidator.cs
index 516a3f1..c7cf415 100644
--- a/Knots/Validators/Group/CreateGroupDtoValidator.cs
+++ b/Knots/Validators/Group/CreateGroupDtoValidator.cs
@@ -1,6 +1,21 @@
+using FastEndpoints;
+using FluentValidation;
+using Knots.DTO.Group;
+
 namespace Knots.Validators.Group;
 
-public class CreateGroupDtoValidator
+public class CreateGroupDtoValidator : Validator<CreateGroupDto>
 {
-    
+    public CreateGroupDtoValidator()
+    {
+        RuleFor(x => x.Nom)
+            .NotEmpty()
+            .WithMessage("You must enter a name for the group")
+            .MaximumLength(50)
+            .WithMessage("Maximum 50 character are required");
+
+        RuleFor(x => x.NombreMembres)
+            .NotEmpty()
+            .WithMessage("Members cannot be empty");
+    }
 }
\ No newline at end of file
diff --git a/Knots/Validators/Group/DeleteGroupDtoValidator.cs b/Knots/Validators/Group/DeleteGroupDtoValidator.cs
index 05039f2..004e2f8 100644
--- a/Knots/Validators/Group/DeleteGroupDtoValidator.cs
+++ b/Knots/Validators/Group/DeleteGroupDtoValidator.cs
@@ -1,6 +1,15 @@
+using FastEndpoints;
+using FluentValidation;
+using Knots.DTO.Group;
+
 namespace Knots.Validators.Group;
 
-public class DeleteGroupDtoValidator
+public class DeleteGroupDtoValidator : Validator<DeleteGroupDto>
 {
-    
+    public  DeleteGroupDtoValidator()
+    {
+        RuleFor(x => x.Id)
+            .NotEmpty()
+            .WithMessage("Id is required");
+    }
 }
\ No newline at end of file
diff --git a/Knots/Validators/Group/GetGroupDetailsDtoValidator.cs b/Knots/Validators/Group/GetGroupDetailsDtoValidator.cs
deleted file mode 100644
index 180e6c0..0000000
--- a/Knots/Validators/Group/GetGroupDetailsDtoValidator.cs
+++ /dev/null
@@ -1,6 +0,0 @@
-namespace Knots.Validators.Group;
-
-public class GetGroupDetailsDtoValidator
-{
-    
-}
\ No newline at end of file
diff --git a/Knots/Validators/Group/GetGroupDtoValidator.cs b/Knots/Validators/Group/GetGroupDtoValidator.cs
index 7c13a4e..ded426f 100644
--- a/Knots/Validators/Group/GetGroupDtoValidator.cs
+++ b/Knots/Validators/Group/GetGroupDtoValidator.cs
@@ -1,6 +1,15 @@
+using FastEndpoints;
+using FluentValidation;
+using Knots.DTO.Group;
+
 namespace Knots.Validators.Group;
 
-public class GetGroupDtoValidator
+public class GetGroupDtoValidator : Validator<GetGroupDto>
 {
-    
+    public  GetGroupDtoValidator()
+    {
+        RuleFor(x => x.Id)
+            .NotEmpty()
+            .WithMessage("Id cannot be empty");
+    }
 }
\ No newline at end of file
diff --git a/Knots/Validators/Group/UpdateGroupDtoValidator.cs b/Knots/Validators/Group/UpdateGroupDtoValidator.cs
index ce15819..0163f5c 100644
--- a/Knots/Validators/Group/UpdateGroupDtoValidator.cs
+++ b/Knots/Validators/Group/UpdateGroupDtoValidator.cs
@@ -1,6 +1,9 @@
+using FastEndpoints;
+using Knots.DTO.Group;
+
 namespace Knots.Validators.Group;
 
-public class UpdateGroupDtoValidator
+public class UpdateGroupDtoValidator : Validator<UpdateGroupDto>
 {
     
 }
\ No newline at end of file
diff --git a/Knots/Validators/Key/GetKeyDetailsDtoValidator.cs b/Knots/Validators/Key/GetKeyDetailsDtoValidator.cs
deleted file mode 100644
index 91e9068..0000000
--- a/Knots/Validators/Key/GetKeyDetailsDtoValidator.cs
+++ /dev/null
@@ -1,6 +0,0 @@
-namespace Knots.Validators.Key;
-
-public class GetKeyDetailsDtoValidator
-{
-    
-}
\ No newline at end of file
diff --git a/Knots/Validators/Message/GetMessageDetailsDto.cs b/Knots/Validators/Message/GetMessageDetailsDto.cs
deleted file mode 100644
index 7e6fed8..0000000
--- a/Knots/Validators/Message/GetMessageDetailsDto.cs
+++ /dev/null
@@ -1,6 +0,0 @@
-namespace Knots.Validators.Message;
-
-public class GetMessageDetailsDto
-{
-    
-}
\ No newline at end of file
diff --git a/Knots/Validators/User/GetUserDetailsDtoValidator.cs b/Knots/Validators/User/GetUserDetailsDtoValidator.cs
deleted file mode 100644
index cd1b1f7..0000000
--- a/Knots/Validators/User/GetUserDetailsDtoValidator.cs
+++ /dev/null
@@ -1,6 +0,0 @@
-namespace Knots.Validators.User;
-
-public class GetUserDetailsDtoValidator
-{
-    
-}
\ No newline at end of file