Как реализовать Вход на сайт если уже существует база данных с маил и паролем

class User(AbstractUser):
    is_confirmed = models.BooleanField(_('confirmed'), default=False)
    email_approval_status = models.CharField(
            _('email_approval_status'), max_length=255,
            choices=STATUS_CHOICES, default=STATUS_NO
        )
    identification_status = models.CharField(
            _('identification_status'), max_length=255,
            choices=STATUS_CHOICES, default=STATUS_NO
        )
    is_provider = models.BooleanField(_('provider'), default=False)
    verification_status = models.CharField(
            _('verification_status'), max_length=255,
            choices=STATUS_CHOICES, default=STATUS_NO
        )
 
    referrer_user = models.ForeignKey('self', related_name='ref_user', verbose_name=_('referrer user'), max_length=40, blank=True, null=True)
 
    date_true = models.DateTimeField(_('date true'), blank=True, null=True)
    date_filling = models.DateTimeField(_('date filling'), blank=True, null=True)
    serial_number = models.CharField(_('serial number'), max_length=12, blank=True, null=True)

class Personalcard(models.Model):
    photo =  models.ImageField(blank=True, upload_to='mainApp/static/images/%Y/%m/%d', verbose_name='Фото' )
    email = models.EmailField(verbose_name='email')
    name = models.CharField(max_length=50, verbose_name='Имя')
    grup = models.CharField(max_length=50, verbose_name='Группа')
    surname = models.CharField(max_length=50, verbose_name='Фамилия')
    patronymic = models.CharField(max_length=50, verbose_name='Отчество')
    specialty = models.CharField(max_length=50, verbose_name='Специальность',)
    floor = models.CharField(max_length=50, verbose_name='Пол')
    dob = models.DateField(verbose_name='Дата рождения')
    nationality = models.CharField(max_length=50, verbose_name='Национальность')
    bpl = models.CharField(max_length=50, verbose_name='Место рождения')
    education = models.CharField(max_length=150, verbose_name='Образование')
    job = models.CharField(max_length=150, verbose_name='Вып-ая работа до поступления')
    marital_status = models.CharField(max_length=50, verbose_name='Семейное положение')
    father = models.CharField(max_length=150, verbose_name='Сведенье об отце' )
    mother = models.CharField(max_length=150, verbose_name='Сведенье об матери')
    address = models.CharField(max_length=150, verbose_name='Домашний адрес')
    the_address_of_this = models.CharField(max_length=150, verbose_name='Прописка в н время')
    number = models.BigIntegerField(verbose_name='Номер телефона')
    password = models.CharField(max_length=50 ,verbose_name='Пароль')
 
 
    def __str__(self):
        return "%s %s %s" %(self.name, self.surname, self.patronymic)

from django.contrib.auth.models import User

from django.shortcuts import render
from django.contrib import auth
from django.template.context_processors import csrf
# Create your views here.
 
def login(request):
    args ={}
    args.update(csrf(request))
    if request.POST:
        username = request.POST.get('username','')
        password = request.POST.get('password','')
        user=auth.authenticate(username=username, password=password)
        if user is not None:
            auth.login(request, user)
            return request('/')
        else:
            args['login_error']="Пользователь не найден"
            return render_to_response('login.html', args)
    else:
        return render_to_response('login.html', args)
 
 
def logout(request):
     auth.logout(request)
     return redirect("/")

from django.contrib import admin
from django.urls import path, include
from . import views
 
urlpatterns = [
    path('admin/', admin.site.urls),
    path('login/', views.login, name='login'),
    path('logout/', views.logout, name='logout'),
]

{% extends "mainApp/wrapper.html" %}
 
 
{% block login %}
<div class="large-offset-3 large-6 columns"
   <from action="/auth/login/" method="post">
       {% csrf_token %}
       <label for="username">Имя пользователя</label>
       <input type="text" name="username" id="username">
       <label for="password">Пароль</label>
       <input type="password" name="password" id="password"
       {% if login_error %}
             <label class="error">{{login_error}}</label>
       {% endif %}
       <input class="button" type="submit" value="Войти">
    </from>
</div>
{% endblock %}

return render_to_response('login.html')