---BackGround---

So I am making a custom admin for somebody and I'm making my own to start out, but how come I can't remove or add Admins?

Information Activation Script: In ServerScriptService, name "Server", lines of code 1, and type of script normal. Main Script: In Activation Script, name adminCommands, lines of 121, and type of script Module script.

Scripts

Activation Script:

require(script.adminCommands)

Main Script:

local m={}
local cmds = game.StartGui.ScreenGui.Frame

--Main Event
game.Players.PlayerAdded:Connect(function(player)
	player.Chatted:Connect(function(msg,r)
		if r then return end
	end)
end)

--Services
local dstore=game:GetService("DataStoreService")

--SetUp Variables
m.database=dstore:GetDataStore("adminCommands")
m.adminList={ --list of userids used for first time admin use
	150334552; -- My Id
	21010010; -- Trusted Player's Id
	-1; -- For testing
}
m.commandStart="!" --What users will use to start the admin

--Do database check
local aList --Real admin list
pcall(function()
	aList=m.database:GetAsync("adminList")
end)
if not aList then
	m.database:SetAsync("adminList",m.adminList)
	aList=m.adminList
end

--Setup parse function
function m.parse(msg,player)
	local playerIsAdmin
	for a,b in pairs(aList) do
		playerIsAdmin=b==player.UserId
		if playerIsAdmin then break end
	end
	if playerIsAdmin then
		if msg:sub(1,1)==m.commandStart then
			if #msg==1 then
				warn("Just command signature, consider inputting a command")
			else
				local line=msg:sub(2,#msg)
				local command,arguments=nil,{}
				for a in line:gmatch("[%w%p]+") do
					if command==nil then command=a else table.insert(arguments,a) end
				end
				if m.commands[command] then --Command exists
					m.commands[command](arguments,player)
				else --Command does not exists
					warn("No Command titles".. command.." exist!")
				end
			end
		end
	end
end

--SetUp commands
m.commands={
	addAdmin=function(arg,caller)
		for a,b in pairs(arg) do
			if tonumber(b) then
				print("Add admin "..b)
				table.insert(aList.tonumber(b))
				m.database:SetAsync("adminList",m.adminList)
			else
				local userid=game.Players:GetUserIdFromNameAsync(b)
				if userid then
				    print("Add admin "..(b))
				    table.insert(aList,userid)
				    m.database:SetAsync("adminList",m.adminList)
				else
					m.warn("addAdmin","Player name \""..b.."\" is not a valid player")
				end
			end
		end
	end;
	removeAdmin=function(arg,caller)
		for a,b in pairs(arg) do
			if tonumber(b) then
				print("Removed admin"..b)
				for d,c in pairs(aList) do
					if c==tonumber(b) then
						table.remove(aList,d)
						break
					end
				end
				m.database:SetAsync("adminList",aList)
			else
				local userid=game.Players:GetUserIdFromNameAsync(b)
				if userid then
				    print("Removed admin"..b)
				    for d,c in pairs(aList) do
					    if c==userid then
						    table.remove(aList,d)
						    break
					    end
				    end
				    m.database:SetAsync("adminList",aList)
				else
					m.warn("removeAdmin","Player name \""..b.."\" is not a valid player")
				end
			end
		end
	end;
	print=function(arg,caller)
		for a,b in pairs(arg) do
			print(b)
		end
	end;
}

--Set custom warn function
function m.warn(cmd,issue)
	warn("In command"..m.commandStart..cmd.." issue occured, receipt: "..issue)
end

--Finish
return m

Note: Anybody can use the fixed code!