My simple ROBLOX to Discord webhook isn't working?

I made a simple suggestion command in ROBLOX, I have enabled HTTP Services and everything but it still doesn't work? I've tried using proxy servers and everything, yet to no avail, could someone help?

local Http = game:GetService('HttpService')
local url = 'https://discordapp.com/api/webhooks/679438743123263516'


game.Players.PlayerAdded(function(plr)
plr.Chatted:connect(function(msg)


    local data = {

        ['content'] = msg,
        ['username'] = plr.Name
     }


if msg:sub(1,12) == '/recommend' then    
 local newData = Http:JSONEncode(data)
Http:PostAsync(newData, url)
end

   end)    
end)