diff --git a/BeReadyBackend/Endpoints/Groups/DeleteUserFromGroupEndpoint.cs b/BeReadyBackend/Endpoints/Groups/DeleteUserFromGroupEndpoint.cs
index fc507d0..2cf2add 100644
--- a/BeReadyBackend/Endpoints/Groups/DeleteUserFromGroupEndpoint.cs
+++ b/BeReadyBackend/Endpoints/Groups/DeleteUserFromGroupEndpoint.cs
@@ -24,14 +24,15 @@ public class DeleteUserFromGroupEndpoint(UserGroupsRepository userGroupsReposito
     {
         int userId = userService.GetUserIdFromToken();
         UserGroup? member = await userGroupsRepository.SingleOrDefaultAsync(new GetUserInGroupByIdsSpec(req.GroupId, req.UserId), ct);
+        UserGroup? user = await userGroupsRepository.SingleOrDefaultAsync(new GetUserInGroupByIdsSpec(req.GroupId, userId), ct);
 
-        if (member is null)
+        if (member is null || user is null)
         {
             await Send.NotFoundAsync(ct);
             return;
         }
 
-        if (member.Grade != "Admin" && userId != req.UserId)
+        if (user.Grade != "Admin")
         {
             await Send.StringAsync("Vous n'avez pas les droits pour supprimer ce membre du groupe", 400, cancellation: ct);
             return;
diff --git a/BeReadyBackend/Endpoints/Groups/LeaveGroupEndpoint.cs b/BeReadyBackend/Endpoints/Groups/LeaveGroupEndpoint.cs
new file mode 100644
index 0000000..70a6f4e
--- /dev/null
+++ b/BeReadyBackend/Endpoints/Groups/LeaveGroupEndpoint.cs
@@ -0,0 +1,37 @@
+using BeReadyBackend.Models;
+using BeReadyBackend.Repositories;
+using BeReadyBackend.Services;
+using BeReadyBackend.Specifications.Groups;
+using FastEndpoints;
+using Group = FastEndpoints.Group;
+
+namespace BeReadyBackend.Endpoints.Groups;
+
+public class GroupLeavedRequest
+{
+    public int Id { get; set; }
+}
+
+public class LeaveGroupEndpoint(UserService userService, GroupsRepository groupsRepository, UserGroupsRepository userGroupsRepository) : Endpoint<GroupLeavedRequest>
+{
+    public override void Configure()
+    {
+        Delete("/Groups/{@Id}/User", x => new { x.Id });
+    }
+
+    public override async Task HandleAsync(GroupLeavedRequest req, CancellationToken ct)
+    {
+        int userId = userService.GetUserIdFromToken();
+        Models.Group? group = await groupsRepository.SingleOrDefaultAsync(new GetGroupByIdSpec(req.Id), ct);
+        UserGroup? user = await userGroupsRepository.SingleOrDefaultAsync(new GetUserInGroupByIdsSpec(req.Id, userId), ct);
+
+        if (group is null || user is null)
+        {
+            await Send.NotFoundAsync(ct);
+            return;
+        }
+
+        await userGroupsRepository.DeleteAsync(user, ct);
+        await Send.NoContentAsync(ct);
+    }
+}
\ No newline at end of file
diff --git a/BeReadyBackend/Endpoints/Groups/PatchGroupUserRoleEndpoint.cs b/BeReadyBackend/Endpoints/Groups/PatchGroupUserRoleEndpoint.cs
index 7ea8212..b1a4597 100644
--- a/BeReadyBackend/Endpoints/Groups/PatchGroupUserRoleEndpoint.cs
+++ b/BeReadyBackend/Endpoints/Groups/PatchGroupUserRoleEndpoint.cs
@@ -1,4 +1,5 @@
-using BeReadyBackend.Models;
+using BeReadyBackend.DTO.Groups;
+using BeReadyBackend.Models;
 using BeReadyBackend.Repositories;
 using BeReadyBackend.Services;
 using BeReadyBackend.Specifications.Groups;
@@ -12,25 +13,28 @@ public class UserRoleRequest
     public int UserId { get; set; }
 }
 
-public class PatchGroupUserRoleEndpoint(UserGroupsRepository userGroupsRepository, UserService userService) : Endpoint<UserRoleRequest>
+public class PatchGroupUserRoleEndpoint(UserGroupsRepository userGroupsRepository, UserService userService, GroupsRepository groupsRepository)
+    : Endpoint<UserRoleRequest, GetGroupDetailsDto>
 {
     public override void Configure()
     {
         Patch("/Groups/{@GroupId}/Users/{@UserId}/Role/", x => new { x.GroupId, x.UserId });
+        Description(x => x.Accepts<UserRoleRequest>());
     }
 
     public override async Task HandleAsync(UserRoleRequest req, CancellationToken ct)
     {
         int userId = userService.GetUserIdFromToken();
         UserGroup? member = await userGroupsRepository.SingleOrDefaultAsync(new GetUserInGroupByIdsSpec(req.GroupId, req.UserId), ct);
+        UserGroup? user = await userGroupsRepository.SingleOrDefaultAsync(new GetUserInGroupByIdsSpec(req.GroupId, userId), ct);
 
-        if (member is null)
+        if (member is null || user is null)
         {
             await Send.NotFoundAsync(ct);
             return;
         }
 
-        if (member.Grade != "Admin" && userId != req.UserId)
+        if (user.Grade != "Admin")
         {
             await Send.StringAsync("Vous n'avez pas les droits pour changer le rôle de ce membre", 400, cancellation: ct);
             return;
@@ -38,6 +42,6 @@ public class PatchGroupUserRoleEndpoint(UserGroupsRepository userGroupsRepositor
 
         member.Grade = "Admin";
         await userGroupsRepository.SaveChangesAsync(ct);
-        await Send.NoContentAsync(ct);
+        await Send.OkAsync(await groupsRepository.ProjectToSingleAsync<GetGroupDetailsDto>(new GetGroupByIdSpec(req.GroupId), ct), ct);
     }
 }
\ No newline at end of file