Code with empty list not executing

[adeana]

usernames = []
for username in usernames:
    if username == 'admin':
        print("Hello admin, would you like a status report?")
    if username != 'admin':
        print("Hello " + username + ", thank you for logging in again!")
    else:
        print("We need more users!")

Error:

what is expected

Output:
We need more users!