[Waverian]

Register a saved variable in your table of contents file with the SavedVariables metadata tag.

## SavedVariables: MyAddonIgnoredUsers

Then register the ADDON_LOADED event to populate your saved variable.

local addonName = ...
local loadHandler = function(self, event, addon)
     -- only proceed if our addon is the one being loaded
     if addon == addonName then
          -- create a new table if it doesnt exist, otherwise use the old one
          MyAddonIgnoredUsers = MyAddonIgnoredUsers or {}
     end
end

Then in command handler, add the user to the ignored table.

MyAddonIgnoredUsers[<insert player name here>] = true

Then in your CHAT_MSG_CHANNEL_JOIN event, check to see if their name is in the table. If it is, don't send them a message.