? Login, Logout & Signup

? Quick Overview

Managing user authentication in Django is made easy through built-in views and forms for login, logout, and signup functionality. These features allow users to securely authenticate, create accounts, and exit sessions without writing complex logic from scratch.

? Key Concepts

• Django authentication framework
• Class-based authentication views
• Secure session handling
• Form-based user validation

? Syntax / Theory

Django provides LoginView and LogoutView for authentication workflows. Signup is typically implemented using UserCreationForm. These tools handle validation, sessions, and redirects securely.

? Login

Login functionality allows users to authenticate and access the system. Django provides a built-in view LoginView for handling login.

# Using Django built-in LoginView
from django.contrib.auth.views import LoginView
from django.urls import path

urlpatterns = [
path('login/', LoginView.as_view(), name='login'),
]

Customizing the Login Form

# Custom login view with template override
from django.contrib.auth.views import LoginView
from django.contrib.auth.forms import AuthenticationForm

class CustomLoginView(LoginView):
template_name = 'login.html'
authentication_form = AuthenticationForm

? Logout

Logout functionality securely ends the user session using Django’s built-in LogoutView.

# Logout route using LogoutView
from django.contrib.auth.views import LogoutView
from django.urls import path

urlpatterns = [
path('logout/', LogoutView.as_view(), name='logout'),
]

? Signup

Django does not include a default signup view, but UserCreationForm simplifies user registration.

# User signup using UserCreationForm
from django.contrib.auth.forms import UserCreationForm
from django.shortcuts import render, redirect

def signup_view(request):
if request.method == 'POST':
form = UserCreationForm(request.POST)
if form.is_valid():
form.save()
return redirect('login')
else:
form = UserCreationForm()
return render(request, 'signup.html', {'form': form})

? Use Cases

• User authentication for web applications
• Role-based access control
• Secure dashboards and admin panels