I have a Google spreadsheet that has not been made public, but just available to anyone that has the access link. Though I can access the data in CSV format from my browser
I'm able to get a wget
-able URL from public spreadsheet URLs that look like this:
https://docs.google.com/spreadsheets/d/LONG_ID_STRING/edit?usp=sharing
by changing them to look like this:
https://docs.google.com/spreadsheets/d/LONG_ID_STRING/export?format=csv
so that my wget command would look like:
$ wget "https://docs.google.com/spreadsheets/d/LONG_ID_STRING/export?format=csv"
Make sure you share the spreadsheet first with the blue "Share" button in the top right, then "Get Sharable Link".