2bootloader.py

import os, time, sys
from pathlib import Path

os.system("cls" if os.name=="nt" else "clear")
os.chdir(Path(__file__).parent) 

def check(noprint=None):
    if os.path.exists("users"):
        if not any(os.scandir("users")):
            os.system("python3 3login.py register")
        else:
            if not noprint == True:
                print("""[1] Login
[2] Create new user
[exit] Exit
                """)
            option = input("\n[]: ")
            if option=="exit":
                os.system("su -c \"shutdown -h now\"")
            elif option=="1":
                os.system("python3 3login.py login")
            elif option=="2":
                os.system("python3 3login.py register")
            else:
                print("Invalid Option.")
                time.sleep(1.5)
                check(noprint=True)
    else:
        os.mkdir("users")
        check()

check()