title: Handling "Authentication Required" alert box with Python 2.7 + Selenium Webdriver
body: <p>I am having an issue with a secure URL:</p>
  
  <p>Opening the URL creates an "Authentication Required" alert box with username and password fields.</p>
  
  <p>I am fairly new to Selenium Webdriver and Python. I am not familiar with handling alerts and am currently manually typing in credentials until I can get this figured out. <strong>I have already tried adding my username/password into the URL. This does not work for me.</strong></p>
  
  <p>Could someone please point me in the direction of entering keys into username and password fields in an alertbox?</p>