docs: change event payload handling in subscribers (#8078)

www/apps/book/app/basics/events-and-subscribers/page.mdx

@@ -98,7 +98,7 @@ export default async function productCreateHandler({
   const productModuleService: IProductModuleService =
     container.resolve(ModuleRegistrationName.PRODUCT)
 
-  const productId = "data" in data ? data.data.id : data.id
+  const productId = data.data.id
 
   const product = await productModuleService.retrieveProduct(
     productId

www/apps/book/app/basics/workflows/page.mdx

@@ -133,7 +133,7 @@ To execute the workflow, invoke it passing the Medusa container as a parameter.
       data,
       container,
     }: SubscriberArgs<{ id: string }>) {
-      const userId = "data" in data ? data.data.id : data.id
+      const userId = data.data.id
       const userModuleService: IUserModuleService = container.resolve(
         ModuleRegistrationName.USER
       )