add back folder expand for backwards compat.

src/Core/Models/Api/Response/LoginResponseModel.cs

@@ -48,6 +48,9 @@ namespace Bit.Core.Models.Api
         public string Password { get; set; }
         public string Notes { get; set; }
         public DateTime RevisionDate { get; set; }
+
+        [Obsolete]
+        public FolderResponseModel Folder { get; set; }
     }
 
     public class LoginDetailsResponseModel : LoginResponseModel