Users and Roles in DreamFactory are important to understand.
A good place to start is to read this blog post about adding users to DreamFactory. Keep in mind that “users” includes both users that can log into the DreamFactory Admin Console, like developers building applications, and end users of the actual applications you’re building. DreamFactory provides a complete end user management system with roles and single sign-on.
Setting up Users and Roles tabs in the DreamFactory Admin Console should be pretty straightforward to understand. The Users tab is documented here and the Roles tab is documented here.