Klarna is a Swedish fintech company that provides online financial services such as payments for online storefronts and direct payments along with post-purchase payments. You can find it in the Payment methods menu of your shop admin. Follow the steps to activate the payment method:

  1. Login to your account or create one her
  2. Follow the instructions and complete the registration
  3. Go to Settings > Generate new Klarna API credentials
  4. Copy/paste them to your admin panel
  5. Save the changes