Click here and log in to your Shopify account.Click “Install payment provider”.In Shopify, go to Settings > Payments > Alternative payment methods, search for MobilePay and choose “MobilePay via Quickpay”.In your Quickpay Manager go to Settings > Integration and find “Agreement ID” and “API Key”. Paste them under account information in Shopify and click “Activate MobilePay via Quickpay”.Video tutorial: