Widget CSS属性未更新身份验证表单Django 2.1

Question

对不起，我是个编程新手，所以很抱歉。 （从业余爱好开始，现在开始一个项目来代替与工作相关的任务，而不是使用excel）

尝试自定义用户模型并扩展django用户模型和身份验证形式，但不进行更新。

宁愿使用django编程来解决该问题，从而进一步了解django。 （不查看jQuery替代，不查看小部件柚木）

users / forms.py

from django import forms
from django.contrib.auth.forms import AuthenticationForm
from .models import CustomUser

class CustomLoginForm(AuthenticationForm):

    class Meta:
        model: CustomUser
        widgets = {
            'username': forms.EmailInput(attrs={'class': 'form-control'}),
            'password': forms.PasswordInput(attrs={'class': 'form-control'}),
        }

urls.py

from django.contrib import admin
from django.urls import path,include
from django.conf import settings
from django.conf.urls.static import static
from users.forms import CustomLoginForm
from django.contrib.auth import views as auth_views    

urlpatterns = [
    path('admin/', admin.site.urls),
    path('organisation/', include('organisation.urls')),
    path('users/', include('django.contrib.auth.urls')),
    path('users/login', auth_views.LoginView.as_view(template_name='registration/login.html',form_class='CustomLoginForm'), name ='login'),

HTML

<div class="card-body">
    <form action="{% url 'login' %}" method="post">
        {% csrf_token %}
        <div class="form-group mb-3">
            <label>{{ form.username.label_tag }}</label>
            <div class="input-group">
                {{ form.username }}
                <span class="input-group-append">
                    <span class="input-group-text">
                        <i class="fas fa-user"></i>
                    </span>
                </span>
            </div>
        </div>

        <div class="form-group mb-3">
            <div class="clearfix">
                <label class="float-left">{{ form.password.label_tag }}</label>
                <a href="pages-recover-password.html" class="float-right">Lost Password?</a>
            </div>
            <div class="input-group">
                {{ form.password }}
                <span class="input-group-append">
                    <span class="input-group-text">
                        <i class="fas fa-lock"></i>
                    </span>
                </span>
            </div>
        </div>

        <div class="row">
            <div class="col-sm-8">
                <div class="checkbox-custom checkbox-default">
                    <input id="RememberMe" name="rememberme" type="checkbox"/>
                    <label for="RememberMe">Remember Me</label>
                </div>
            </div>
            <div class="col-sm-4 text-right">
                <button type="submit" class="btn btn-primary mt-2">Sign In</button>
            </div>
        </div>