I have a spreadsheet, ex.:
https://docs.google.com/spreadsheets/d/1_qVnTw1Cwb2Ziwta_N0p-V4_ptD6-ZypDvCIrnryNFU/pubhtml
that I want to download as a CSV file. To do this, I believe I must download it from a link similar to this:
https://spreadsheets.google.com/pub?hl=en&hl=en&key={INSERT KEY HERE}&output=csv
But my question is, how do I go about getting the "key"?