update dynamic images

MediaBrowser.Api/ItemUpdateService.cs

@@ -41,8 +41,8 @@ namespace MediaBrowser.Api
         [ApiMember(Name = "ContentType", Description = "The content type of the item", IsRequired = true, DataType = "string", ParameterType = "query", Verb = "POST")]
         public string ContentType { get; set; }
     }
-    
-    [Authenticated]
+
+    [Authenticated(Roles = "admin")]
     public class ItemUpdateService : BaseApiService
     {
         private readonly ILibraryManager _libraryManager;
@@ -61,7 +61,7 @@ namespace MediaBrowser.Api
         public object Get(GetMetadataEditorInfo request)
         {
             var item = _libraryManager.GetItemById(request.ItemId);
-            
+
             var info = new MetadataEditorInfo
             {
                 ParentalRatingOptions = _localizationManager.GetParentalRatings().ToList(),
@@ -131,7 +131,7 @@ namespace MediaBrowser.Api
                     Value = ""
                 });
             }
-            
+
             list.Add(new NameValuePair
             {
                 Name = "FolderTypeMovies",
@@ -406,7 +406,7 @@ namespace MediaBrowser.Api
                     .Select(i => i.Name)
                     .ToList();
             }
-            
+
             var song = item as Audio;
             if (song != null)
             {