variable gets lost

[Jordy]

why doesn't this work??

admin = ['Jordy', 'Julian']
logged_in = 0

def login(name):
    for i in admin:
        if name == i:
            print("Welcome in the system " + name)
            logged_in = 1
            break
    else:
        print('you are not an admin')

def set_user():
    if logged_in == 1:
        setu = 1
        if setu == 1:
            setu += 1
            print('we need some data')
            lastname = input('what is your lastname ')

login(input('fill in your name '))
set_user()

---

it results in this error:

Error:
Traceback (most recent call last):
 File "python", line 24, in <module>
 File "python", line 14, in set_user
NameError: name 'logged_in' is not defined