**Course Title:** Mastering Django Framework: Building Scalable Web Applications **Section Title:** User Authentication and Authorization **Topic:** Implement a user authentication system with registration and login features.(Lab topic) **Objective:** By the end of this topic, you will be able to implement a user authentication system with registration and login features using Django's built-in authentication system. You will learn how to create user registration and login functionality, manage user permissions, and secure user accounts. **Prerequisites:** * You should have a basic understanding of Django and its ecosystem. * You should have completed the previous topics in the User Authentication and Authorization section. **Step 1: Create a New Django Project and App** Create a new Django project and app using the following commands: ```bash django-admin startproject auth_project cd auth_project python manage.py startapp auth_app ``` **Step 2: Install Required Packages** Install the required packages using pip: ```bash pip install django ``` **Step 3: Configure Django's Authentication System** In your `settings.py` file, add the following lines to configure Django's authentication system: ```python AUTH_USER_MODEL = 'auth_app.User' ``` **Step 4: Create a User Model** Create a new file called `models.py` in your `auth_app` directory and add the following code to define a custom user model: ```python from django.contrib.auth.models import AbstractUser from django.db import models class User(AbstractUser): email = models.EmailField(unique=True) phone_number = models.CharField(max_length=20) ``` **Step 5: Create a User Registration Form** Create a new file called `forms.py` in your `auth_app` directory and add the following code to define a user registration form: ```python from django import forms from .models import User class UserRegistrationForm(forms.ModelForm): password = forms.CharField(widget=forms.PasswordInput) confirm_password = forms.CharField(widget=forms.PasswordInput) class Meta: model = User fields = ('email', 'phone_number', 'password', 'confirm_password') ``` **Step 6: Create a User Registration View** Create a new file called `views.py` in your `auth_app` directory and add the following code to define a user registration view: ```python from django.shortcuts import render, redirect from .forms import UserRegistrationForm from django.contrib.auth import authenticate, login def register(request): if request.method == 'POST': form = UserRegistrationForm(request.POST) if form.is_valid(): user = form.save(commit=False) user.set_password(form.cleaned_data['password']) user.save() return redirect('login') else: form = UserRegistrationForm() return render(request, 'register.html', {'form': form}) ``` **Step 7: Create a User Login View** Create a new file called `views.py` in your `auth_app` directory and add the following code to define a user login view: ```python from django.shortcuts import render, redirect from django.contrib.auth import authenticate, login def login_view(request): if request.method == 'POST': username = request.POST['username'] password = request.POST['password'] user = authenticate(request, username=username, password=password) if user is not None: login(request, user) return redirect('home') return render(request, 'login.html') ``` **Step 8: Create URLs for User Registration and Login** Create a new file called `urls.py` in your `auth_app` directory and add the following code to define URLs for user registration and login: ```python from django.urls import path from . import views urlpatterns = [ path('register/', views.register, name='register'), path('login/', views.login_view, name='login'), ] ``` **Step 9: Include URLs in Main Project** Include the URLs in the main project's `urls.py` file: ```python from django.urls import include, path urlpatterns = [ path('auth/', include('auth_app.urls')), ] ``` **Conclusion:** In this topic, you learned how to implement a user authentication system with registration and login features using Django's built-in authentication system. You created a custom user model, a user registration form, and user registration and login views. You also created URLs for user registration and login. **Exercise:** Try to implement the user authentication system in a real-world project. **Additional Resources:** * Django documentation: <https://docs.djangoproject.com/en/4.1/topics/auth/> * Django authentication tutorial: <https://docs.djangoproject.com/en/4.1/topics/auth/#how-to-log-a-user-in> **Leave a comment or ask for help if you have any questions or need further clarification on any of the steps.**