Here the company can create new users to manage the backoffice. You will have to create an e-mail and password for every user so they can log in to the backoffice. You can grant roles to the user to give the user differnet authorizations. Below a short explaination concerning the differnet roles: 

Administrator: this role is usually for the manager(s). The users with this role have full access to the backoffice to see and ;anage everything.

User: This role can only manage and see orders. This role is usefull for a cashier or shop assistentwho needs to keep an eye on the orders.