When creating a user in KaseyaOne, they need to be assigned a role to determine the level of access they should have in KaseyaOne. The Master role, is an administrator that has access to manage users and settings and view billing and support info for your whole KaseyaOne account. The Billing role, has access to billing but not administrative tasks. And the User role, does not have access to billing or administrative tasks.
Please check out the KaseyaOne User Roles article to learn more.