How to embed login ID & password in a script?

[joe at actionline.com]

How can I embed the login ID and password in a script
so I can use google-chrome to open a document from the
command line automatically?

I now use this:

google-chrome --app --incognito https://docs.google.com/document...

But it then asks for my user ID and password before the
document is opened, even though I am already logged in
to google chrome.