How to connect to WiFi without hardcoding the credentials in Espruino Pico?

Thank you! @Gordon

I had the following defensive code that caused the issue. It does not work because 'f.read(0) ' is a typed array and condition failed to assign a value.

let apSSID = f.read(0) && E.toString(f.read(0))

This works perfectly fine

let apSSID = typeof f.read(0) !== 'undefined' ? E.toString(f.read(0)) : '';