hook.py

from django.auth.models import User
from django.shortcuts import get_object_or_404

#this view would be publicly accessable
def hook(request, username=None):
    user = get_object_or_404(User, username=username) #cant remember the syntax
    if not isinstance(User, user):
        return user #this returns a 404

    #now we know what user we are dealing with
    #so we do something with the data github just posted to us
    data = request.POST.get('payload')
    data = json.dumps(data) #or simplejson if necessecary

    #do something with the data
    
    return HttpResponse("OK")