Configuring in Mollie
Most of the configuration happens within the Mollie control panel. You must setup your website profile on the Mollie website, under settings. Under this website profile you should add all the payment gateways you wish to accept via Mollie. You may also further customise how the checkout window looks in the same area.
Configuring in XenForo
Navigate to your Admin Panel -> Setup -> Payment profiles. Click "Add payment profile" in the top right, and choose Mollie in the dropdown menu. Follow the instructions on the page to setup your integration, note carefully the instructions below the "Live secret key" box.
As per the information on the Requirements page, you MUST have an active Mollie account that has the capability to process live payments. You will then be able to fetch your live API key from Mollie's API keys page. Insert that live secret key in the box.
Once you have a payment profile created, just head over to Users -> User Upgrades and select the desired user upgrade and add your newly created Mollie payment profile to it. Now, your users will be able to check out for that user upgrade using the Mollie payment gateway via our integration.