Authorise Paypal Account Access
Automatically check your Paypal Account for Discogs order Payments and update orders to 'Payment Received'
On receipt of Payment Magento orders have an invoice created.
A Paypal Business account is required
Log into your Paypal Business Account, and go to: Account Settings > API Access > NVP/SOAP API integration (Classic) > Request an API signature
Admin > Stores > Configuration > D2MPro Paypal > API Authorisation
Submit your API Username, Password and Signature.