...
def create_user(username,password,vpnPassword):
    userinfo = {
        'username': username,
        'firstName': 'FIRSTNAME',
        'lastName': 'USERNAME',
        'email': 'user@domain.com',
        'companyName': 'MyCompanyName',
        'address1': 'MyAddress1',
        'city': 'MyCity',
        'country': 'MyCountry',
        'postalCode': 'MyPostalCode',
        'userStatusId': 1022,
        'timezoneId': 117
    }
    created_user = client['SoftLayer_User_Customer'].createObject(
        userinfo,
        password,
        vpnPassword)
    return created_user
...
newUsername = '111111_user@domain.com'
vpn_password = '@VPN_4_pwd'
...
new_user = create_user(newUsername,password,vpn_password)
...