B2B-3725 - BC token as an alternative to B2B

Author: bc-victor

docs/storefront/catalyst/development/b2b.mdx

@@ -26,8 +26,9 @@ To create a B2B storefront on the Catalyst platform, you will need the following
 - Git and a GitHub account. 
 - Node.js and PNPM. 
 - A Vercel account. Using your GitHub account to sign up is recommended for ease. 
-- A V3 BC API token. 
-- A V3 B2B API token. You can retrieve this from the B2B control panel under the "API Accounts" tab by clicking "Create API account." Ensure it is a V3 API token. 
+- A V3 BC API token with Sites and B2B Edition scopes. 
+
+- **DEPRECATED, please use the above BC API token with scopes** A V3 B2B API token. You can retrieve this from the B2B control panel under the "API Accounts" tab by clicking "Create API account." Ensure it is a V3 API token. 
 
 ### 1. Using Catalyst CLI
 
@@ -48,6 +49,7 @@ Environment variables to add:
 - BIGCOMMERCE_STORE_HASH
 - BIGCOMMERCE_STOREFRONT_TOKEN: Use your store API key to get a storefront token. Refer to the BigCommerce developer documentation for [creating a token](https://developer.bigcommerce.com/docs/rest-authentication/tokens#create-a-token). 
 - BIGCOMMERCE_CHANNEL_ID 
+- BIGCOMMERCE_ACCESS_TOKEN: A store-level API account token used for REST API actions. This integration requires `modify` scope on B2B Edition for this token.
 - ENABLE_ADMIN_ROUTE: Default to `true`. 
 - AUTH_SECRET: Generate it using `openssl rand -hex 32`. 
 - TURBO_REMOTE_CACHE_SIGNATURE_KEY: Generate using openssl rand -hex 32. 
@@ -57,7 +59,6 @@ Also add the B2B related environment variables:
 
 - B2B_API_HOST: https://api-b2b.bigcommerce.com.
   - This is the domain of the B2B API. NOTE: Make sure this value does not have a trailing slash.
-- B2B_API_TOKEN: The V3 B2B API token obtained during the preparation step. 
 
 Once all environment variables are set, we can proceed with deployment.