Moved from int id to guid

UserService.Infrastructure/DataModels/MembersMember.cs

@@ -0,0 +1,13 @@
+using System;
+namespace UserService.Infrastructure.DataModels
+{
+    public class MembersMember
+    {
+        public Guid MemberId { get; set; }
+        public Member? Member { get; set; }
+
+        public Guid AttachedMemberId { get; set; }
+
+        public Member? AttachedMember { get; set; }
+    }
+}