OpenPermissions is an open-source library and utility for smoothly, efficiently and easily managing permissions in your GLua addons.
DO NOT install this if you have GmodAdminSuite installed to your server -- OpenPermissions should already be installed.
Simply download from GitHub and install into your addons folder like usual.
Note: GmodAdminSuite comes with OpenPermissions, so you don't need to install OpenPermissions if you already have GmodAdminSuite.
To open the OpenPermissions menu, type !openpermissions in chat, or type openpermissions in your game's console.
You can only access the menu if you have permission to, read below for more information.
OpenPermissions has very minimal configuration, and is configured using the openpermissions-config addon.
Want to integrate OpenPermissions into your addon? Check out the wiki for more information.