How to get a Players Username based on a string?

https://noblox.js.org/

Here’s the code I’m using:

Please post an image of the error you are receiving.

Error: Required argument "userId" is missing 

Please show the whole output window.

Just go look at the source code I’m using lol.

The source code is not the error.

I just need to get the players username from a string value.

You need to provide the entire error for us to assist.

Add me on discord, we can further discuss on there.

Please provide it here so anyone can help you.

No, I don’t want to leak out my codings and personal information.

And I’m simply looking for a solution to my topic question, so please refrain from going off topic.

I am not going off-topic; I am trying to assist you with fixing your error.

That’s not a solution for my question.