you can open ticket with support and they will add it back for you
Reach out to customer service and let them know that you forgot to add it during signup. They can add it for you! The $10 bill credit will show up within 48-72 hours.
Please click this link below to message customer service:
Keep an eye on your mailbox here as that is where your reply will come in (envelope icon on desktop, click your avatar icon in the corner and then click messages if on mobile).