Does Django automatically recognize registration/login.html as the login template?

Does Django automatically recognize templates/registration/login.html as the login page? I'm working on a Django project and want to use Django's built-in authentication system for user login. I didn't set path to /login in urls.py but it's working on url/accounts/login/?next=/.

My question is:

Does Django automatically recognize registration/login.html as the default login template?
If so, how does Django determine this file's location?
Do I need to set anything in settings.py to make this work?
Where is written the logic for this built in login

Yes Django automatically recognizes registration/login.html as the default login template when using Django's built-in authentication system django.contrib.auth Here's how it works

How does Django determine this file's location?

Django's LoginView searches for registration/login.html in the directories specified in the TEMPLATES setting under 'DIRS' and in any installed apps that have a templates/registration/login.html file.

For example, if your TEMPLATES setting in settings.py looks like this

TEMPLATES = [
    {
        'BACKEND': 'django.template.backends.django.DjangoTemplates',
        'DIRS': [BASE_DIR / "templates"],  # Django searches here
        'APP_DIRS': True,  # Django also searches in installed apps
        'OPTIONS': {
            'context_processors': [
                'django.template.context_processors.debug',
                'django.template.context_processors.request',
                'django.contrib.auth.context_processors.auth',
                'django.contrib.messages.context_processors.messages',
            ],
        },
    },
]

Django will look for templates/registration/login.html inside your project's BASE_DIR/templates/ and inside the templates/ directories of any installed apps.

Do I need to set anything in settings.py to make this work?

No, by default, Django’s LoginView automatically looks for registration/login.html. However, you can override the default login URL by setting it explicitly in settings.py

LOGIN_URL = "/custom-login/"  # Change default login URL
LOGIN_REDIRECT_URL = "/"  # Redirect after successful login

If you override the LOGIN_URL you need to define a URL pattern for it in urls.py

from django.contrib.auth import views as auth_views

urlpatterns = [
    path("custom-login/", auth_views.LoginView.as_view(template_name="myapp/custom_login.html"), name="login"),
]

Where is the logic for this built-in login?

Django's built-in login logic is implemented in LoginView, which is located in

django/contrib/auth/views.py

The core login logic is defined in LoginView which extends FormView and uses Django’s authentication system

class LoginView(FormView):
    template_name = 'registration/login.html'
    authentication_form = AuthenticationForm
    redirect_field_name = REDIRECT_FIELD_NAME

The actual authentication logic is handled by Django's authenticate() and login() functions, which are located in