Is there a way to pull a password protected site (knowing the password of course)
I guess you are referring to the “open url” feature. It’s not possible to open a password protected page. Pinegrow provides not the option to login. Maybe this is going to be add and supported by them in a future version. They constantly update and improve the Pinegrow app with new features.
You can download/transfer your page(s), with an (S)FTP app to your system, and open them locally.