Repository where all the data for integration is stored:
https://github.com/ifthenpay/Shopify-Config

NOTE: When setting up your Multibanco References account through API request in your Shopify store and if you want the respective references to have an expiration date, you must contact our support, indicating the NIF associated with the contract, the MB KEY (format AAA-000000), and specify the expiration date (in days) you want.