Retrieves the loyalty account of the specified site contact or member.
The getAccountBySecondaryId() function returns a Promise that resolves to the specified loyalty account when it is retrieved.
This function gets a loyalty account using either a customer's contact ID or member ID. You can also get an account using the loyalty account ID with the getAccount() function.
Note: Only visitors with Manage Loyalty permissions can retrieve a loyalty account.
You can only call this method when authenticated as a Wix app or Wix user identity.
ID of the customer to retrieve loyalty account for.