Merge pull request AdobeDocs#330 from oshmyheliuk/CEXT-4373

CEXT-4373: Update the oope shipping methods documentation

Author: jhadobe

src/pages/starter-kit/checkout/getting-started.md

@@ -29,6 +29,8 @@ You must install or have access to the following prerequisites to develop with t
 
 ## Install Commerce modules
 
+Before installing Commerce modules, ensure that you have the required credentials in `auth.json` with [access to the Adobe Commerce repository](https://experienceleague.adobe.com/en/docs/commerce-operations/installation-guide/prerequisites/authentication-keys).
+
 - Install the Out-of-Process Payment Extensions (OOPE) module on Adobe Commerce
 
     To enable out-of-process payment methods in Commerce, install the `magento/module-out-of-process-payment-methods`. This module enables out-of-process payment functionalities.

src/pages/starter-kit/checkout/use-cases.md

@@ -213,6 +213,8 @@ You can find examples of how to filter out payment methods using customer data o
 
 You can add shipping methods to the checkout process by using [webhooks](../../webhooks/index.md).
 
+To add shipping methods, you must [run a script to automatically create shipping carriers](./configure.md#create-shipping-carriers) or [create shipping carriers manually](./shipping-reference.md#shipping-api-reference) using the REST API. Only shipping methods with registered carriers are available in the checkout process.
+
 After the webhook is registered, every time a shopping cart is requested, a synchronous call is dispatched to the App Builder application implementing the shipping method to calculate the shipping cost and provide the available shipping methods.
 
 Refer to [`actions/shipping-methods.js`](https://github.com/adobe/commerce-checkout-starter-kit/blob/main/actions/shipping-methods/index.js) for an example of how to process the request and return the list of available shipping methods.