OAuth access provides access for PartnerApp to users receipts. User has ReceiptHero account and wants to deliver receipts from ReceiptHero account to PartnerApplication for processing.
Users can choose receipts that PartnerApp has access to. Selection is based on cards.
Partnerapplipaction implements OAuth 2.0 flow to retrieve an access token for users card specific receipts.
Card selection is implemented by ReceiptHero