authentication using selenium

from selenium import webdriver
from selenium.webdriver.common.keys import Keys
import time
browser = webdriver.Firefox()
browser.get("http://app.justwedlinks.in/login.php")
time.sleep(10)
username = browser.find_element_by_name("user")
password = browser.find_element_by_name("pwd")
username.send_keys("anyname")
password.send_keys("anypassword")
login = browser.find_element_by_xpath("//*[@type='submit']")
login.submit()