Permission control in QuickBuild is implemented through group and user. The administrator creates groups and give them certain permissions. All users in the group will have the permissions defined for the group. A single user can be associated with multiple groups, and the user permission is the union of all permissions of all groups.
Groups are managed through menu Administration/Group Management as indicated below:
Users are managed through menu Administration/User Management as indicated below:
The administrator account is created when you initially setup the server and cannot be deleted. However you can follow the account link to edit its details including changing the password.