在管理员中创建用户时，自定义用户模型中的自定义字段不显示

from django.contrib.auth.models import AbstractUser
from django.db import models

class CustomUser(AbstractUser):
    custom_field = models.CharField(max_length=100)

python manage.py makemigrations
python manage.py migrate

from django.contrib import admin
from .models import CustomUser

admin.site.register(CustomUser)

from django.contrib import admin
from django.contrib.auth.admin import UserAdmin
from django.contrib.auth.forms import UserCreationForm, UserChangeForm
from .models import CustomUser

class CustomUserCreationForm(UserCreationForm):
    class Meta(UserCreationForm.Meta):
        model = CustomUser
        fields = UserCreationForm.Meta.fields + ('custom_field',)

class CustomUserChangeForm(UserChangeForm):
    class Meta(UserChangeForm.Meta):
        model = CustomUser
        fields = UserChangeForm.Meta.fields + ('custom_field',)

class CustomUserAdmin(UserAdmin):
    add_form = CustomUserCreationForm
    form = CustomUserChangeForm
    model = CustomUser
    list_display = ['username', 'email', 'custom_field']

admin.site.register(CustomUser, CustomUserAdmin)