External link account
Enable qualifying apps to link to an external website for account creation or management.
Overview
If you develop a qualifying app, you can complete a request for an entitlement that allows you to link to an external website for account creation or management. For more information about whether your app qualifies and how to request an entitlement, see Distributing “reader” apps with a link to your website.
If your account has the com.apple.developer.storekit.external-link.account entitlement, implement the following to link to an external website for account creation and management:
Configure the SKExternalLinkAccount property list key.
Use the ExternalLinkAccount type’s canOpen property and open() method.