A simple login and registration process to implement to your Django app.

We're going to create an app that is going to take care of our authentication:
<pre class="language-markup"><code>python manage.py startapp user</code></pre>
We'll call the app user, I recommend this name due to its relevance with the authentication system.
<pre class="language-markup"><code>INSTALLED_APPS = [
 ...
 'user' # New line...
]</code></pre>

Creating an App

<pre class="language-python"><code>from django.contrib.auth.forms import UserCreationForm
from django.contrib.auth import get_user_model
from django import forms

class RegisterForm(UserCreationForm):

 password1 = forms.CharField(
 widget=forms.PasswordInput(attrs={'type':'password', 'placeholder':'Password'}),
 )
 password2 = forms.CharField(
 widget=forms.PasswordInput(attrs={'type':'password', 'placeholder':'Confirm password'}),
 )
 class Meta:
 model = get_user_model()
 fields = ('email', 'username')

 widgets = {
 'email' : forms.TextInput(attrs = {'class': 'full-width', 'placeholder': 'Email' }),
 'username' : forms.TextInput(attrs = {'class': 'full-width', 'placeholder': 'Username' }),
 }</code></pre>
Explanation:
We're creating a <code>RegisterForm</code>, this Django form inherits from the <code>UserCreationForm</code>, a built-in Django form (comes with built-in functionality).
Notice that by adding <code>widgets</code> to the class Meta, we can add a class attribute to our desired inputs. This is a way to style our inputs in the form.

Registration Form

<pre class="language-python"><code>from django.shortcuts import render, redirect
from django.contrib.auth import login, logout
from user.forms import RegisterForm

def registration_view(response):
 form = RegisterForm()
 if response.method=='POST':
 form = RegisterForm(response.POST)
 if form.is_valid():
 user = form.save()
 login(response, user)
 return redirect('home')

 return render(response, 'user/register.html', {'form' : form})</code></pre>
Explanation:
We're using the <code>RegisterForm</code> we just created to take care of the registration of our users.
If the request that comes from the client is a POST request, we pass the data to the <code>RegisterForm</code>, we then check if the data entered by the user is valid using the is_valid() method.&nbsp;
After that, a user instance is created in our database when calling <code>form.save()</code>, and we log the user in using the <code>login()</code> method.
After the flow is complete, we redirect the user to the homepage.

Registration View

user/templates/register.html
<pre class="language-markup"><code>&lt;form method="post"&gt;
 {% csrf_token %}
 {{form}}
 &lt;button type="submit"&gt;Register&lt;/button&gt;
&lt;/form&gt;
</code></pre>
We will simply render the form using <code>{{form}}</code>.
user/urls.py
<pre class="language-python"><code>from . import views

urlpatterns = [
 path('register/', views.registration_view, name="register"),
]</code></pre>
The registration page is in localhost:8000/register/

Display the Registration Form

user/templates/login.html
<pre class="language-markup"><code>&lt;form method="post"&gt;
 {% csrf_token %}
 &lt;input type="text" name="username" placeholder="username"&gt;
 &lt;input type="password" name="pass" placeholder="password"&gt;
 &lt;button type="submit"&gt;Log In&lt;/button&gt;
&lt;/form&gt;</code></pre>
We created a form with a POST method and some inputs. The data will be passed to the server based on the name of each input tag.
user/views.py:
<pre class="language-python"><code>from django.shortcuts import render, redirect
from django.contrib.auth import login, logout, authenticate

def login_view(request):
 username = request.POST.get('username',)
 password = request.POST.get('pass',)
 user = authenticate(request, username=username, password=password)
 if user is not None:
 login(request, user)
 return redirect('home')

 return render(request, 'user/login.html')</code></pre>
We manually created an HTML form and got the values from the request using&nbsp;<code>request.POST.get('input name')</code>.

Login View & Template

user/urls.py:
<pre class="language-python"><code>urlpatterns = [
 # Previous register url here...
 path('login/', views.login_view, name="login"),
]</code></pre>
This will enable a login page in localhost:8000/login/

Login URL

To restrict a view/page in your app so that only authenticated users can access it, use the <code>@login_required</code> decorator.
Example (views.py):
<pre class="language-python"><code>from django.contrib.auth.decorators import login_required

@login_required
def some_restricted_view(request):
	# Your code here</code></pre>
In the case of a class-based view:
<pre class="language-python"><code>from django.contrib.auth.mixins import LoginRequiredMixin
from django.views import View

class RestrictedView(LoginRequiredMixin, View):
 # Your code here</code></pre>

Django simple login and registration

Creating an App

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Creating an App

Registration Form

Registration View

Display the Registration Form

Login View & Template

Login URL

How to Restrict a Page