Kakao Social Login with Django

kakao_auth.py

class KakaoAuth:
    REST_API_KEY       = KAKAO_REST_API_KEY
    REDIRECTION_URI    = API_HOST_ADDRESS + "/users/signin/kakao/callback"
    OAUTH_API_ENDPOINT = "https://kauth.kakao.com/oauth"
    AUTH_API_ENDPOINT  = OAUTH_API_ENDPOINT + "/authorize"
    TOKEN_API_ENDPOINT = OAUTH_API_ENDPOINT + "/token"

    @classmethod
    def get_auth_redirection_url(cls):
        return f'{cls.AUTH_API_ENDPOINT}?response_type=code&client_id={cls.REST_API_KEY}&redirect_uri={cls.REDIRECTION_URI}'    

    @classmethod
    def get_token_response(cls, auth_code):
        payload = {
            'grant_type': 'authorization_code',
            'client_id': KAKAO_REST_API_KEY,
            'redirection_uri': cls.REDIRECTION_URI,
            'code': auth_code,
        }
        return requests.post(cls.TOKEN_API_ENDPOINT, payload)
        

class KakaoSignInView(View):
    def get(self, request):
        return redirect(KakaoAuth.get_auth_redirection_url())

class KakaoSignInCallBackView(View):
    def get(self, request):
        try:
            auth_code          = request.GET.get('code')
            error              = request.GET.get('error')

            if error:
                error_description  = request.GET.get('error')
                return JsonResponse({"status": "UNAUTHORIZATION_ERROR", "message": error_description}, status=401)

            token_response     = KakaoAuth.get_token_response(auth_code)
            access_token       = token_response.json().get('access_token')
            user_info_response = requests.get('https://kapi.kakao.com/v2/user/me', headers={"Authorization": f'Bearer ${access_token}'})
            user_info          = user_info_response.json()

            kakao_id          = user_info['id']
            username          = user_info['properties']['nickname']
            profile_image_url = user_info['properties']['profile_image']
            email             = user_info['kakao_account'].get('email')

            if (User.objects.filter(kakao_id = kakao_id).exists()):
                user = User.objects.get(kakao_id = kakao_id)
            
            else:
                user = User.objects.create(
                                            username          = username,
                                            email             = email,
                                            profile_image_url = profile_image_url,
                                            kakao_id          = kakao_id,
                                          )
            token    = issue_token(user) 
            
            return JsonResponse({"status": "SUCCESS", "data": {"token": token}}, status=200)

        except KeyError as e:
            return JsonResponse({"status": "KEY_ERROR", "message": f'Key Error in Field "{e.args[0]}"'}, status=400)
 
        except requests.exceptions.Timeout as e:
            return JsonResponse({"status": "TIMEOUT_ERROR", "message": e.response.message}, status=e.response.status_code)

        except requests.exceptions.ConnectionError as e:
            return JsonResponse({"status": "CONNECTION_ERROR", "message": e.response.message}, status=e.response.status_code)

        except requests.exceptions.HTTPError as e:
            return JsonResponse({"status": "TIMEOUT_ERROR", "message": e.response.message}, status=e.response.status_code)
        
        except DuplicatedEntryError as e:
            return JsonResponse({"status": "DUPLICATED_ENTRY_ERROR", "message": e.err_message}, status=409)