import keyring
from keyring.backends.Windows import WinVaultKeyring

keyring.set_keyring(WinVaultKeyring())

keyring.set_password(
    service_name='service1',
    username='user1',
    password='password1'
)

keyring.set_password(
    service_name='service1',
    username='user2',
    password='password2'
)

# As expected:
print(keyring.get_credential(service_name="service1",username="user1").password)
print(keyring.get_credential(service_name="service1",username="user2").password)

# I think as expected (defaults most recent? not 100% confident of expected)
# behavior here
print(keyring.get_credential(service_name="service1",username=None).password)

# I think we should expect `None`?
print(keyring.get_credential(service_name="service1",username="nobody!").password)