User Authentication in DjangoRestFramework using SimpleJWT [Login, Signup]

Hello Devs, In this blog you will learn how to create User Authentication, login and signup API's in djangorestframework using SimpleJWT.

Source Code:- https://github.com/ShivamRohilllaa/DjangoRestFramework-UserAuthentication/

Post Link:- https://pythondjangogeek.com/django/streamlined-user-authentication-with-django-and-si/

I hope you guys knows how to create a django project so I am skipping those steps and let's jump on code directly.

Create virtual enviornment,

python3 -m venv envname

Install these packages:-

django
djangorestframework
djangorestframework-simplejwt

Add restframework in your installed apps in settings.py file:

INSTALLED_APPS = [
    'rest_framework',
]

and add these settings for rest_framework and simpleJWT.

REST_FRAMEWORK = {
    'DEFAULT_AUTHENTICATION_CLASSES': (
        'rest_framework_simplejwt.authentication.JWTAuthentication',
    )
}    

SIMPLE_JWT = {
    'ACCESS_TOKEN_LIFETIME': timedelta(days=15),
    'AUTH_HEADER_TYPES': ('Bearer',),
    'AUTH_TOKEN_CLASSES': ('rest_framework_simplejwt.tokens.AccessToken',),
}

Create Model for a student

class Student(models.Model):
    auth = models.OneToOneField(User, on_delete=models.CASCADE, related_name='student_profile')
    name = models.CharField(max_length=100)
    email = models.EmailField(max_length=100)

    def __str__(self):
        return self.name

and now we will create user signup and user profile serializers for signup and login

from rest_framework import serializers
from userapp.models import Student
from django.contrib.auth.models import User

class UserSignupSerializer(serializers.ModelSerializer):
    class Meta:
        model = User
        fields = ('first_name', 'last_name', 'email', 'password')

    extra_kwargs = {
        'first_name': {'required': True, 'allow_blank': False},
        'last_name': {'required': True, 'allow_blank': False},
        'email': {'required': True, 'allow_blank': False},
        'password': {'required': True, 'allow_blank': False},        
    }    


class UserSerializer(serializers.ModelSerializer):
    class Meta:
        model = User
        fields = ('id', 'first_name', 'last_name', 'email', 'username')

now write views for utilise the serializers

from django.shortcuts import render
from .models import Student
from .serializers import UserSignupSerializer, UserSerializer
from rest_framework.decorators import api_view
from rest_framework.response import Response
from rest_framework import status

from django.contrib.auth.hashers import make_password
from django.contrib.auth.models import User

@api_view(['POST'])
def signup(request):
    data = request.data
    serializer = UserSignupSerializer(data=data)
    if serializer.is_valid():
        if not User.objects.filter(username=data['email']).exists():
            user = User.objects.create(first_name=data['first_name'], last_name=data['last_name'], username=data['email'], email=data['email'], password=make_password(data['password']))
            user.save()
            student = Student.objects.create(auth=user, name=data['first_name'], email=data['email'])
            return Response({'message':'User Created Successfully'}, status=status.HTTP_201_CREATED)
        else:
            return Response({'message':'User Already Exists'}, status=status.HTTP_400_BAD_REQUEST)
    else:
        return Response(serializer.errors, status=status.HTTP_400_BAD_REQUEST)

@api_view(['GET'])
def login(request):
    data = request.data
    if User.objects.filter(username=data['email']).exists():
        user = User.objects.get(username=data['email'])
        if user.check_password(data['password']):
            return Response(UserSerializer(instance=user).data, status=status.HTTP_200_OK)
        else:
            return Response({'message':'Invalid Password'}, status=status.HTTP_400_BAD_REQUEST)
    else:
        return Response({'message':'User Does Not Exist'}, status=status.HTTP_400_BAD_REQUEST)

Now map these views in urls.py

urlpatterns = [
    path('signup/', views.signup, name='signup'),
    path('login/', views.login, name='login'),

and for testing these endpoints use postman and pass these responses

for singup api

{
"first_name": "demo",
"last_name": "demo",
"email": "[e-mail]",
"password": "demo"
}

for login

{
"email": "[e-mail]",
"password": "demo"
}

Source Code

Source Code:- https://github.com/ShivamRohilllaa/DjangoRestFramework-UserAuthentication/

Thank You
Shivam Rohilla | Python Developer

DM me your queries:-
https://www.linkedin.com/in/shivamrohillaa/