from django.http import HttpResponse, HttpResponseRedirect def login(request): # validate user credentials, set authenticated variable if authenticated: response = HttpResponseRedirect('dashboard/') response.set_cookie('logged_in', 'true', max_age=3600) return response else: return HttpResponse('Invalid credentials')In this example code, the user is redirected to the dashboard page if their credentials are valid. A cookie is set with the name `logged_in` and value `true`, expiring after one hour. The library used in this code is Django, a high-level Python web framework.