vista de la app registration

views.py

from django.contrib.auth.forms import UserCreationForm
from django.views.generic import CreateView
from django.urls import reverse_lazy
from django import forms

from django.contrib.auth import password_validation
from django.utils.functional import lazy
from django.utils.html import format_html
from django.utils.module_loading import import_string
from django.utils.translation import gettext as _, ngettext

def _password_validators_help_text_html_for_bulma(password_validators=None):
    """
    Redefinimos el método _password_validators_help_text_html para que 
    retorne un string HTML string con todos los help texts de todos los validadores
    configurados en una <ul> agregando la clase "help" requerida por bulma.
    """
    help_texts = password_validation.password_validators_help_texts(
        password_validators)
    help_items = [format_html('<li>{}</li>', help_text)
                    for help_text in help_texts]
    return '<ul class="help">%s</ul>' % ''.join(help_items) if help_items else ''

password_validators_help_text_html_for_bulma = lazy(
    _password_validators_help_text_html_for_bulma, str)

# Create your views here.
class SignUpView(CreateView):
    form_class = UserCreationForm
    template_name = 'registration/signup.html'

    def get_success_url(self):        
        return reverse_lazy('login') + '?register'

    def get_form(self, form_class=None):
        form = super(SignUpView, self).get_form()

        form.fields['password1'].help_text = password_validators_help_text_html_for_bulma

        return form