Script helping Tables

Local Script:

wait(3)
local IgnoreList = {820815974,410439752,1297434472,68032045,483341929,1391469467,4514749}
local plr = game.Players:GetPlayerFromCharacter(script.Parent.HumanoidRootPart:FindFirstAncestorOfClass(“Model”))
local Bodys = {
[“BodyGyro”] = true,
[“BodyThrust”] = true,
[“BodyVelocity”] = true,
[“BodyPosition”] = true
}
while wait(1) do

if script.Parent.Humanoid.WalkSpeed == 22 or script.Parent.Humanoid.WalkSpeed == 16 or script.Parent.Humanoid.WalkSpeed == 12 then


elseif plr.UserId ~= IgnoreList[] then
	game.ReplicatedStorage.ExAn:FireServer(plr.Name,"WalkSpeed Changed",script.Parent.Humanoid.WalkSpeed)
	warn("ALERTED WALKSPEED")
	script:Destroy()
end

end
The problem: How do I perceive all the userids?

In your case just do

elseif not table.find(IgnoreList, plr.UserId) then