You can delete your account in your Account Settings. Simply click the profile icon in the top-left corner and select "Account". Then go to the "Account Settings" tab.
Please note that all your data and documents will be deleted, and cannot be restored. Once you delete your profile, it's gone forever.
(Anyway, we hope this means you got the job you wanted! 😊 )
Tip:
If you want to delete your account because you want us to stop charging your credit card, then please don't. You don't have to delete your whole account to cancel your premium subscription. Simply unsubscribe in your subscription settings.