react to contact changes not being set from identity

src/Api/Models/Request/FolderRequestModel.cs

@@ -13,11 +13,11 @@ namespace Bit.Api.Models
         [StringLength(300)]
         public string Name { get; set; }
 
-        public Cipher ToCipher(string userId = null)
+        public Cipher ToCipher(Guid userId)
         {
             return ToCipher(new Cipher
             {
-                UserId = new Guid(userId)
+                UserId = userId
             });
         }