ActiveCampaign Email Marketing Reseller API

We need a form to create new accounts, upgrades, downgrades into a reseller account of Active Campaing with this API [login to view URL] But, before the account get created, we need to charge the subscription elected with stripe payment method [login to view URL], and if the user makes an upgrade or downgrade. The thing is to automatize the process of [login to view URL] just like [login to view URL], you register your account, get into an admin panel, and have your billing details, plan details, accounts bought, payment history, etc.. (I don´t know if it has a name. but only we need we need to automate Mailfrappe) thanks!