The first thing you need to do is to get a Slack token here. Use, create or request a token for each workspace that you'll use on Sclack. Not all workspaces allow you to generate a token, so sometimes you'll need to ask for the administrator to enable the feature. Sclack seems better when used with a Nerd Font. Using them is completely optional, but it is how some Sclack icons are possible. Personally, I use Fira Code Nerd Font. Download, install and set as the default font of your terminal emulator.