def login(sock):
    print("Welcome")
    user = input("Username:")
    password = input("Password:")
    sock.send(user.encode())
    sock.send(password.encode())
    if (sock.recv((Buffer_size)).decode() == '0'):
        print("Login errado")
        return (None, 0)
    else:
        print("Login correto")
        return (user, 1)