django-linkedin & oauth2

I took the code below from django-linked in which is code from
oauth2. It works but does not do the callback.
How do you set the call back from oauth2

# from settings.py
consumer = oauth.Consumer(settings.LINKEDIN_TOKEN,
settings.LINKEDIN_SECRET)
client = oauth.Client(consumer)

request_token_url = 'https://api.linkedin.com/uas/oauth/requestToken'
access_token_url = 'https://api.linkedin.com/uas/oauth/accessToken'
authenticate_url = 'https://www.linkedin.com/uas/oauth/authenticate'

def oauth_login(request):
# Step 1. Get a request token from Provider.
resp, content = client.request(request_token_url, "GET")
if resp['status'] != '200':
raise Exception("Invalid response from Provider.")

# Step 2. Store the request token in a session for later use.
request.session['request_token'] = dict(cgi.parse_qsl(content))

# Step 3. Redirect the user to the authentication URL.
url = "%s?oauth_token=%s" % (authenticate_url,
request.session['request_token']['oauth_token'])

return HttpResponseRedirect(url)

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