Advanced Player sensor

s = peripheral.find("openperipheral_sensor")

whitelist = {}
sp = 2


function list()
  if fs.exists("whitelist") == false then
    shell.run("edit whitelist")
    else
    print("whitelist already exist!")
    sleep(1)
    term.clear()
    term.setCursorPos(1,1)
  end
end

function getList()
  local datafile = fs.open("whitelist", "r")
  for name in datafile.readLine do
    whitelist[name:lower()] = true
  end
  datafile.close()

function Auth()
  term.setCursorPos(1,10)
    for  t, result in ipairs(s.getPlayers()) do
    local name = result.name:lower()
    if whitelist[name] then
      -- if whitelist
      else
      -- if not whitelist
    end
  end
end


list()
getList()

while true do
  Auth()
  sleep(sp)
end