log failed login attempts

I mean like "[2014-12-13 07:22:09,573] INFO [core.signals:11] login
attempt for username 'Jennifer_Userton' failed"

core/__init__.py

@@ -0,0 +1,12 @@
+from django.apps import AppConfig
+
+from core.signals import log_failed_login
+
+class FinetoothConfig(AppConfig):
+    name = "core"
+    verbose_name = "Finetooth Core"
+
+    def ready(self):
+        import core.signals
+
+default_app_config = "core.FinetoothConfig"

core/signals.py

@@ -0,0 +1,12 @@
+import logging
+
+from django.contrib.auth.signals import user_login_failed
+from django.dispatch import receiver
+
+logger = logging.getLogger(__name__)
+
+@receiver(user_login_failed)
+def log_failed_login(sender, **kwargs):
+    logger.info("login attempt for username '{}' failed".format(
+        kwargs['credentials']['username'])
+    )