startup.lua

repeat
    term.clear()
    term.setCursorPos(1,1)
    print("username:")
    username = read()

    print("password:")
    password =read("*")
    correct = username == "LinusAuener" and password == "Let_Me_In!"
if not correct then
 print("username or password wrong")
 sleep(1)
end

until correct

print("Welcome dude")
redstone.setOutput("left",true)
sleep(7) os.reboot()