Developers manage their apps through the Accrescent Developer Console. To sign up, visit the website and sign in with your GitHub account. At this time only whitelisted users are permitted to register. You will be prompted to grant Accrescent access to your GitHub email addresses. This is required so that Accrescent can send email alerts when the status of your app changes.
After registering, you will be presented with a dashboard. From here you can click "New app" to start the process of uploading a new app. But before you do, be sure to read the rest of the publishing documentation.