5. Successful seller connections are confirmed on the aggregator Settings page
On the Settings page > Data Services section, you can confirm which accounts the seller has successfully connected to Xapix as shown in the screenshot below
Furthermore, you can use the CoGS upload component to upload CoGS data in the same way that the seller can, as outlined here
6. What about sellers who previously connected Amazon Seller Central or Amazon Advertising services but do not have user accounts?
If a previously connected seller does not have a user account and you would like them to connect additional data services or re-authorize existing services, you will see a specific link on the settings page that can be shared with the relevant user as shown below
The seller can then go through the one-time registration process and will automatically be assigned to the existing seller account, where they can take further action such as adding a new data service, re-authorizing an existing service or uploading CoGS data