We create the Signup view, one of the most important. It is important to keep in mind the difference of action between the GET and the POST.

app/authentification/forms.py

@@ -0,0 +1,10 @@
+from django import forms
+from django.contrib.auth.forms import UserCreationForm
+from django.contrib.auth.models import User
+
+class SignupForm(UserCreationForm):
+    email = forms.EmailField(max_length=200, help_text='Required')
+
+    class Meta:
+        model = User
+        fields = ('username', 'email', 'password1', 'password2')

app/authentification/tokens.py

@@ -0,0 +1,9 @@
+from django.contrib.auth.tokens import PasswordResetTokenGenerator
+from django.utils import six
+class TokenGenerator(PasswordResetTokenGenerator):
+    def _make_hash_value(self, user, timestamp):
+        return (
+            six.text_type(user.pk) + six.text_type(timestamp) +
+            six.text_type(user.is_active)
+        )
+account_activation_token = TokenGenerator()

app/authentification/views.py

@@ -0,0 +1,42 @@
+from django.shortcuts import render
+from .forms import SignupForm
+from django.contrib.sites.shortcuts import get_current_site
+from django.utils.encoding import force_bytes
+from django.utils.http import urlsafe_base64_encode
+from django.template.loader import render_to_string
+from .tokens import account_activation_token
+from django.core.mail import EmailMessage
+from django.views.generic import TemplateView
+
+class SignupView(TemplateView):
+    template_name = 'signup.html'
+    form_class = SignupForm
+
+    def get(self, request, *args, **kwargs):
+        form = self.form_class()
+        return render(request, self.template_name, {'form': form})
+
+    def post(self, request, *args, **kwargs):
+        form = self.form_class(request.POST)
+
+        if form.is_valid():
+            user = form.save(commit=False)
+            user.is_active = False
+            user.save()
+            current_site = get_current_site(request)
+            mail_subject = 'Activate your blog account.'
+
+            message = render_to_string('acc_active_email.html', {
+                'user': user,
+                'domain': current_site.domain,
+                'uid':urlsafe_base64_encode(force_bytes(user.pk)).decode(),
+                'token':account_activation_token.make_token(user),
+            })
+            to_email = form.cleaned_data.get('email')
+            email = EmailMessage(
+                        mail_subject, message, to=[to_email]
+            )
+            email.send()
+            return render(request, 'validate_mail_address_complete.html')
+        else:
+            return render(request, self.template_name, {'form': form})