added custom url redirect option, and updated readme

README.md

@@ -48,3 +48,10 @@ To group by different period use the following setting:
 ```python
 SESSION_EXPIRE_AFTER_LAST_ACTIVITY_GRACE_PERIOD = 60 # group by minute
 ```
+
+To redirect to a custom url define the following setting:
+
+```python
+SESSION_TIMEOUT_CUSTOM_REDIRECT = 'your_redirect_url_here/'
+```
+...note the trailing slash.

src/django_session_timeout/middleware.py

@@ -2,6 +2,7 @@
 
 from django.conf import settings
 from django.contrib.auth.views import redirect_to_login
+from django.shortcuts import redirect
 
 try:
     from django.utils.deprecation import MiddlewareMixin
@@ -27,7 +28,10 @@ def process_request(self, request):
 
         if session_is_expired:
             request.session.flush()
-            return redirect_to_login(next=request.path)
+            if settings.SESSION_TIMEOUT_CUSTOM_REDIRECT is not None:
+                return redirect(settings.SESSION_TIMEOUT_CUSTOM_REDIRECT)
+            else:
+                return redirect_to_login(next=request.path)
 
         expire_since_last_activity = getattr(
             settings, "SESSION_EXPIRE_AFTER_LAST_ACTIVITY", False