Prevent NullRef for empty ids in bulk endpoint

src/Sonarr.Api.V3/ProviderBulkResource.cs

@@ -9,6 +9,11 @@ namespace Sonarr.Api.V3
         public List<int> Ids { get; set; }
         public List<int> Tags { get; set; }
         public ApplyTags ApplyTags { get; set; }
+
+        public ProviderBulkResource()
+        {
+            Ids = new List<int>();
+        }
     }
 
     public class ProviderBulkResourceMapper<TProviderBulkResource, TProviderDefinition>

src/Sonarr.Api.V3/ProviderControllerBase.cs

@@ -106,6 +106,11 @@ namespace Sonarr.Api.V3
         [Produces("application/json")]
         public ActionResult<TProviderResource> UpdateProvider([FromBody] TBulkProviderResource providerResource)
         {
+            if (!providerResource.Ids.Any())
+            {
+                throw new BadRequestException("ids must be provided");
+            }
+
             var definitionsToUpdate = _providerFactory.Get(providerResource.Ids).ToList();
 
             foreach (var definition in definitionsToUpdate)