Stopping people loging in twice

Hello, if i am using this generic view in my urls.py?

(r'^accounts/login/$', 'django.contrib.auth.views.login',
{'template_name': 'myapp/login.html'}),

Is there a way i can stopped people who are already logged in logging
in again?

Thanks
--~--~---------~--~----~------------~-------~--~----~
You received this message because you are subscribed to the Google Groups 
"Django users" group.
To post to this group, send email to django-users@xxxxxxxxxxxxxxxx
To unsubscribe from this group, send email to 
django-users+unsubscribe@xxxxxxxxxxxxxxxx
For more options, visit this group at 
http://groups.google.com/group/django-users?hl=en
-~----------~----~----~----~------~----~------~--~---