title: Pass additional parameters to post_save signal
body: <p>I have a user registration form in my Django application which collects additional data while a user is trying to register such as address, city, country, phone number etc.</p>
  
  <p>This data is saved in the Account model class through <code>post_save</code> signal. The user creation process goes something like this :</p>
  
  <pre><code># Function to Create user Account/Profile
  def create_user_account(sender, instance, created, **kwargs):
      if created:
        models.Account.objects.create(user=instance)
  
  # Create User / User Registration
  def UserRegistration(request):
      if request.method == 'POST':
          username = request.POST['fn'].capitalize() + ' ' + request.POST['ln'].capitalize()
          # CREATE USER
          newuser = User.objects.create_user(username=username, email=request.POST['email'], password=request.POST['pw'])
          newuser.first_name = request.POST['fn'].capitalize()
          newuser.last_name = request.POST['ln'].capitalize()
          newuser.save()
      return HttpResponse(username)
  
  #Post Save handler to create user Account/Profile
  post_save.connect(create_user_account, sender=User)
  </code></pre>
  
  <p>Here the <code>UserRegistration</code> function is called when a user posts a form and under this function, I can get the POST data, what I want is to pass that data to <code>create_user_account</code> method so that it fills in the fields in the <code>Account</code> model.</p>
  
  <p>Right now, I do see <code>Account</code> objects created in the database, but all the fields except the user field are empty. Obviously, because the POST variables are not being passed to the <code>create_user_account</code> method.</p>