The script comes with two default roles (1) Admin (2) User. To create more roles, you can navigate to Left Sidebar -> Role Menu. Here is the screenshot of this page:
Click on the "Add New" button to add new roles and enter the name of the role. Each role should have a unique name. Default roles are not deletable. However, the roles you create can be deleted.
The script uses spatie/laravel-permission package to manage roles & permissions. You can read more about this page at https://github.com/spatie/laravel-permission
In case you have any query, you can raise a ticket at our support portal.