VYPER 2.0 METHOD
1.) In your dashboard, in the upper right corner, click on your profile picture and then select Billing.
2.) On the next page, you will see Cancel Your Account, click that to cancel.
VYPER 1.0 METHOD
Once you cancel your account, please note that all your data will be set to erase within 24 hours. After your account is cancelled, you cannot get your data back.
Go to your manage account page.
Then click the "deactivate your account" link.