Permission schema

Customers

Permissions	Roles
Register customer	Guest, Agent, Manager, Administrator
Edit customer	Customer, Agent, Manager, Administrator
Remove customer	Manager, Administrator

Callback requests

Permissions	Roles
New request	Agent, Manager, Administrator
Edit request	Agent, Manager, Administrator
Remove request	Agent, Manager, Administrator

User management

Permissions	Roles
Create users	Manager, Administrator
Edit users	Manager, Administrator
Remove users	Manager, Administrator
Update profile	Agent
Manage roles	Administrator