Under Payment tab of Billing page, you can add your credit card details. We use Stripe for processing transaction and all of our connections are secured with a 256 bit SSL.
By clicking on ADD CARD button, an embed Stripe form will be shown similar to below image.
Once you added your card, it will be display under same tab which looks like below screen.
In case if you want to updates card details simply click on edit icon at right bottom of card section.
If you have any concern, you can submit to our support portal any time.