docs: def _GetAuthCookie(self, auth_token):
  		"""Fetches authentication cookies for an authentication token.
  
  		Args:
  			auth_token: The authentication token returned by ClientLogin.
  
  		Raises:
  			HTTPError: If there was an error fetching the authentication cookies.
  		"""
  		# This is a dummy value to allow us to identify when we're successful.
  		continue_location = "http://localhost/"
  		args = {"continue": continue_location, "auth": auth_token}
  		req = self._CreateRequest("https://%s/_ah/login?%s" % (self.host, urllib.urlencode(args)))
  		try:
  			response = self.opener.open(req)
  		except urllib2.HTTPError, e:
  			response = e
  		if (response.code != 302 or
  				response.info()["location"] != continue_location):
  			raise urllib2.HTTPError(req.get_full_url(), response.code, response.msg, response.headers, response.fp)
  		self.authenticated = True