Nodinite uses Role based security. The Access Management sub menu of the Administration menu is from where a user part of the predefined Nodinite Administrators role manages access rights. Policy based Access Management is a topic detailed in the Managing Nodinite page, see section User Management. Make sure to read and understand the basic concepts before continuing.
There are three manageable entities available in the Access Management menu:
Simply follow the user guide "Add or manage Role".
Simply follow the user guide "Add or manage User".
Simply follow the user guide "Add or manage Windows AD Group".