completed authentication serializers

authentication/backends.py

@@ -0,0 +1,26 @@
+import jwt
+from django.conf import settings
+from django.contrib.auth.models import User
+from rest_framework import authentication, exceptions
+
+
+class JWTAuthentication(authentication.BaseAuthentication):
+    def authenticate(self, request):
+
+        auth_data = authentication.get_authorization_header(request)
+
+        if not auth_data:
+            return None
+
+        prefix, token = auth_data.decode("utf-8").split(" ")
+
+        try:
+            payload = jwt.decode(token, settings.JWT_SECRET_KEY, algorithms="HS256")
+            user = User.objects.get(username=payload["username"])
+            return (user, token)
+        except jwt.DecodeError as err:
+            raise exceptions.AuthenticationFailed("Your token is invalid, please login")
+        except jwt.ExpiredSignatureError as err:
+            raise exceptions.AuthenticationFailed("Your token is expired, login")
+
+        return super().authenticate(request)