How to see Sheets as data source?

I'm using Retool for the first time. I just connected my Sheets account as a resource. In the sample app, I added a table component and I don't see Sheets in the Data Source field -- only "Use JavaScript" and "Use an array". I thought Sheets would be added as a data source, and when you select it it would allow you to select your Sheets file and choose columns for the table. What step am I missing?

Update: I found the answer -- I needed to set up queries that return data first: Building an app with Google Sheets - JOYK Joy of Geek, Geek News, Link all geek