Whatsapp Api

Hi all.

I am trying to set up the webhook whatsapp Api.
Whatsapp Api sends me this GET request, and I need to send back in the response the hub.challenge value, but when I try to do so it generates an error.
I think the function stack thinks I want a value like this. Because the name has a dot in it.

{
hub: {
challenge: 12345
},
}

How can I fix this error, if the name value has dots that I have to change?

Thanks.! [image.png]