How to read from a array list?

I am trying to make an array list that checks if the players name is in the game and if so not to affect their camera but I am quite new to arrays and do not really understand how they work. If someone could help me with this that would be great, the lines that are necessary is line 9 and line 26. The code is down below.

local ReplicatedStorage = game:GetService("ReplicatedStorage")
local DisableCamAll = ReplicatedStorage:WaitForChild("DisableCamAll")
local CamAll = ReplicatedStorage:WaitForChild("CamAll")
local gui = game.ReplicatedStorage["CamOnDev"]
local cam = workspace.CurrentCamera
local CamPart = game.Workspace.CamPart
Disable = true

local playerlist = {"Eletrinn"}

DisableCamAll.OnClientEvent:Connect(function()
	Disable = false
end)

CamAll.OnClientEvent:Connect(function(txt)
	Disable = true
	local FocusPart = game.Workspace:WaitForChild(txt).UpperTorso
	local player = game.Players.LocalPlayer.Name
	print("Cam Enabled.")
	if player == "Eletrinn" then
		game.Players:WaitForChild(player).PlayerGui:WaitForChild("CamOnDev").Frame.Enable.Visible = false
		game.Players:WaitForChild(player).PlayerGui:WaitForChild("CamOnDev").Frame.Disable.Visible = true
	else
		print("You are not Eletrinn")
	end
	if player == playerlist then
		print("Camera Not affected")
	else
		while Disable == true do
			cam.CameraType = Enum.CameraType.Scriptable
			cam:Interpolate(CamPart.CFrame, FocusPart.CFrame, 0.5)
			wait(0.2)
		end
	end
end)