code: def register(self, request, **cleaned_data):
          
          if Site._meta.installed:
              site = Site.objects.get_current()
          else:
              site = RequestSite(request)
              
          create_user = RegistrationProfile.objects.create_inactive_user
          new_user = create_user(
              cleaned_data['username'],
              cleaned_data['email'],
              cleaned_data['password1'],
              site,
              send_email=False
          )
          new_user.first_name = cleaned_data['first_name']
          new_user.last_name = cleaned_data['last_name']
          new_user.save()
          
          user_info = UserInfo(
              user=new_user,
              company=cleaned_data['company'],
              function=cleaned_data['function'],
              address=cleaned_data['address'],
              postal_code=cleaned_data['postal_code'],
              city=cleaned_data['city'],
              country=cleaned_data['country'],
              phone=cleaned_data['phone'],
          )
          user_info.save()
          
          send_activation_email(new_user, site, user_info)
          send_activation_pending_email(new_user, site, user_info)
          
          signals.user_registered.send(sender=self.__class__, user=new_user, request=request)
          
          return new_user
docs: Given a username, email address and password, register a new
          user account, which will initially be inactive.
  
          Along with the new ``User`` object, a new
          ``registration.models.RegistrationProfile`` will be created,
          tied to that ``User``, containing the activation key which
          will be used for this account.
  
          Two emails will be sent. First one to the admin; this email should
          contain an activation link and a resume of the new user infos.
          Second one, to the user, for inform him that his request is pending.
  
          After the ``User`` and ``RegistrationProfile`` are created and
          the activation email is sent, the signal
          ``registration.signals.user_registered`` will be sent, with
          the new ``User`` as the keyword argument ``user`` and the
          class of this backend as the sender.