Each item has a set of Accounts related to the user's connection with that specific institution. These accounts represent in Pluggy a Product that can be collected and updated in daily syncs.
These accounts have a set of fields that identifies uniquely to the user's data in their corresponding institution and group his Transactions that were done by that account.
Account numbers, like credit card numbers or bank account numbers, are offuscated for security reasons.
For more information visit the Account section for a detailed explanation of what each field represents.