如何在Django UserCreationForm中设置is_active=False

from django.contrib.auth.forms import UserCreationForm
from django.contrib.auth.models import User

class CustomUserCreationForm(UserCreationForm):
    def save(self, commit=True):
        user = super().save(commit=False)
        user.is_active = False  # 将is_active设置为False
        if commit:
            user.save()
        return user

from django.shortcuts import render, redirect
from .forms import CustomUserCreationForm

def register(request):
    if request.method == 'POST':
        form = CustomUserCreationForm(request.POST)
        if form.is_valid():
            form.save()
            # 进行其他操作，如发送激活邮件等
            return redirect('success')
    else:
        form = CustomUserCreationForm()
    return render(request, 'register.html', {'form': form})

<form method="post">
  {% csrf_token %}
  {{ form.as_p }}
  <button type="submit">注册</button>
</form>