Register StoreCheckoutRelationHelper with DI container

Author: mattbrailsford

src/Umbraco.Commerce.Checkout/UmbracoCommerceCheckoutUmbracoBuilderExtensions.cs

@@ -7,6 +7,7 @@
 using Umbraco.Commerce.Checkout.Configuration;
 using Umbraco.Commerce.Checkout.Events;
 using Umbraco.Commerce.Checkout.Extensions;
+using Umbraco.Commerce.Checkout.Helpers;
 using Umbraco.Commerce.Checkout.Services;
 
 namespace Umbraco.Commerce.Checkout
@@ -45,6 +46,9 @@ public static IUmbracoBuilder AddUmbracoCommerceCheckout(
             // Register services
             builder.Services.AddSingleton<InstallService>();
 
+            // Register helpers
+            builder.Services.AddSingleton<StoreCheckoutRelationHelper>();
+
             // Register Umbraco event handlers
             builder.AddNotificationAsyncHandler<ContentCacheRefresherNotification, SyncZeroValuePaymentProviderContinueUrl>();
             builder.AddNotificationAsyncHandler<ContentCacheRefresherNotification, SetStoreCheckoutRelation>();