Django middleware to automatically log user out after X minutes

middleware.py

import arrow #you can use datetime here
from django.contrib import auth
from django.utils import timezone
from django.conf import settings # where I have set FORCE_LOGOUT_IN to 5

class AutoForceLogoutMiddleware(object):
    
    SESSION_KEY = 'auto-force-logout'
    
    def __init__(self, get_response=None):
        self.get_response = get_response
        
        def callback(sender, user=None, request=None, **kwargs):
            if request:
                request.session[self.SESSION_KEY] = arrow.utcnow().replace(minutes=settings.FORCE_LOGOUT_IN).timestamp
        auth.signals.user_logged_in.connect(callback, weak=False)
    
    
    def __call__(self, request):
        
        response = self.get_response(request)
        
        return response   
        
    def process_view(self, request, *args, **kwargs):
        try:
            if not request.user.is_authenticated():
                return
        except AttributeError:
            return
        
        try:
            logout_time = arrow.get(request.session[self.SESSION_KEY]).datetime
        except KeyError:
            # May not have logged in since we started populating this key.
            return
        
        if timezone.now() < logout_time:
            request.session[self.SESSION_KEY] = arrow.utcnow().replace(minutes=settings.FORCE_LOGOUT_IN).timestamp 
            return
        
        auth.logout(request)
        
        
## Note ##
# Because this hits the DB for every request, you should be using some form of session caching #