This modules allows admin to assign permission to different roles. To access this module, you can navigate to Left Sidebar -> Permission Menu. Here is the screenshot of this page:
Permissions are grouped into multiple modules. You can select the module to get the list of all permission under it. By default "Admin" role has all the permission to perform action. However, the "User" role has limited permission. You can assign permission as per your requirement.
In case you have any query, you can raise a ticket at our support portal.