I have an Android (Flutter) application. Shopify is not yet integrated, and I’m looking for the proper solution. The user must login into my application before access the store, so I have a valid email address belongs to the user. I want to retrieve the completed and successful transactions/orders belong to this specific user through API. I don’t want to use the API for initiating the purchase, I just want to access the transactions of the specific user. Is it possible somehow?