+    def _login(self):
+        username, password = self._get_login_info()
+        if username is None:
+            return
+
+        login_page = self._download_webpage(
+            self._LOGIN_URL, None, 'Downloading signin page')
+
+        login_form = self._hidden_inputs(login_page)
+
+        login_form.update({
+            'username': username,
+            'password': password,
+        })
+
+        post_url = urljoin(self._LOGIN_URL, self._search_regex(
+            r'<form[^>]+action=(["\'])(?P<url>.+?)\1', login_page,
+            'post url', default=self._LOGIN_URL, group='url'))
+
+        response, urlh = self._download_webpage_handle(
+            post_url, None, 'Logging in', data=urlencode_postdata(login_form),
+            headers={'Referer': self._LOGIN_URL})
+
+        if self._LOGIN_URL in urlh.geturl():
+            error = clean_html(get_element_by_class('form-message', response))
+            if error:
+                raise ExtractorError(
+                    'Unable to login: %s' % error, expected=True)
+            raise ExtractorError('Unable to log in')
+
+    def _real_initialize(self):
+        self._login()
+