The role of a user in Ship.Cars indicates their permission level and what features they can access.
Owner - Full company management.
Supervisor - Can manage a majority of features within Ship.Cars.
Dispatcher - Responsible for Drivers and Orders.
Driver - Manage orders only assigned to them.
Accountant - Able to view orders and verify payments.

Additionally, the following roles can be combined with a driver and vice-versa.
Owner, Supervisor, Dispatcher, Driver.