Yay! You want to have an Opopop account :)
Please go to: https://opopop.com/account/register to register for an Opopop account.
You can still order or sign up for subscription without an Opopop account. If you would like to modify or cancel your subscription, you will have to register for an Opopop account, using the same email you used to place your order/subscription.
If you have any questions, please contact customer service!