Prevent account creation when authenticated

basetheme_bootstrap/views.py

@@ -9,6 +9,7 @@ from django.contrib.auth.forms import PasswordChangeForm
 from django.core.mail import send_mail
 from django.db.models import ProtectedError
 from django.forms import widgets
+from django.http import HttpResponseForbidden
 from django.shortcuts import render, redirect
 from django.template import TemplateDoesNotExist
 from django.utils.translation import ugettext
@@ -49,6 +50,8 @@ def change_password(request):
 
 
 def signup(request):
+    if not request.user.is_anonymous:
+        return HttpResponseForbidden()
     if request.method == 'POST':
         form = UserCreationFormWithMore(request.POST)
         if form.is_valid():