coding style conflict with the tutorial itself

variable user is using for both string and object type different values. these situation is called "ninja code" bu author :)

"Add a new variable only when absolutely necessary.
Instead, reuse existing names. Just write new values into them."
https://javascript.info/ninja-code

1-js/05-data-types/12-json/article.md

@@ -425,9 +425,9 @@ alert( numbers[1] ); // 1
 Or for nested objects:
 
 ```js run
-let user = '{ "name": "John", "age": 35, "isAdmin": false, "friends": [0,1,2,3] }';
+let userData = '{ "name": "John", "age": 35, "isAdmin": false, "friends": [0,1,2,3] }';
 
-user = JSON.parse(user);
+let user = JSON.parse(userData);
 
 alert( user.friends[1] ); // 1
 ```