Choose the Centra store that new buyers are added to.
When Junipeer creates an account in Centra, it also has to create at least one buyer for it. That buyer is added to this store.
Choose from the list – it shows the stores in your Centra.
Good to know
If the list is empty, check that Centra is connected. An empty list almost always means the connection, not the setting.
If a value is missing, create it in Centra first, then click Clear Cache on the settings page so the list is refreshed.