[rewrite] Added a config manager and some test code

backend/app/utils/jwt_utils.py

@@ -0,0 +1,13 @@
+from app.extensions import jwt_redis_blocklist
+
+from . import jwt_manager
+
+from app import app
+
+
+@jwt_manager.token_in_blocklist_loader
+def check_if_token_is_revoked(jwt_header, jwt_payload: dict) -> bool:
+    jti = jwt_payload["jti"]
+    token_in_redis = jwt_redis_blocklist.get(jti)
+
+    return token_in_redis is not None