Adds catalog line items and/or custom line items to a checkout.
When adding catalog (SDK | REST) items
to a checkout, the lineItems.catalogReference.appId
and lineItems.catalogReference.catalogItemId
fields are required.
You can only call this method when authenticated as a Wix app or Wix user identity.
There is 1 error with this status code.
This method may also return standard errors. Learn more about standard Wix errors.