Find my Wi-Fi password on Macbook

So I correct my question it seems like you do not understand it. I've connected my Macbook to someone's Wi-Fi hotspot and I forgot the password I've used. Can anyone help me find the password in my Macbook like It be done on Windows computers ?

The matter is to find it in the Macbook not in the router or the phone.

Regards.

I've found how to do It : using Keychain access in the link below :

https://www.softwarehow.com/find-wifi-password-mac/

Regards

I cannot find it in the Macbook ?