Users with the admin role are able to view and update payment methods in Luna Playground, if you add a payment method it can be used by any admin user within your company to pay for Luna product subscriptions.
You can attach your credit card in the Billing section through the Account Management page.
To do this follow these steps:
Go to Sign in page and ensure you're logged in.
Click into your username in the top right corner of the screen.
Click the Account and then Billing button.
Add credit card information and click the Save card button.