Add new file

+import jwt
+import json
+from rest_framework import status
+
+from django.http import JsonResponse
+from django.core.exceptions import ObjectDoesNotExist
+
+from django.conf import settings
+from api.models import User
+
+
+def login_decorator(func):
+    def wrapper(self, request, *args, **kwargs):
+        if 'Authorization' not in request.headers:
+            return JsonResponse({'Error': 'INVALID_LOGIN'}, status=status.HTTP_401_UNAUTHORIZED)
+
+        request_token = request.headers['Authorization']
+        encode_token = request_token.encode('utf-8')
+
+        try:
+            payload = jwt.decode(encode_token, settings.SECRET_KEY, algorithm='HS256')
+            user = User.objects.get(int_id=payload['int_id'])
+            request.user = user
+
+        except jwt.exceptions.DecodeError:
+            return JsonResponse({'Error': 'INVALID_TOKEN'}, status=status.HTTP_400)
+
+        except User.DoesNotExist:
+            return JsonResponse({'Error': 'UNKNOWN_USER'}, status=status.HTTP_400)
+
+        return func(self, request, *args, **kwargs)
+
+    return wrapper
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