#3936 - Validate maxAge appropriateness before use #5
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Note: Typescript could find the error because it related to type checking. It is related to Javascript Falsey type.
![image](https://user-images.githubusercontent.com/20860900/166986995-22a0710d-f224-4381-a464-9a1194c41ab2.png)
https://github.com/expressjs/express/pull/3936/files