Help with Setting Data to be private per App User

Hi, Hope I’ve set up everything right here, this is my first question.

I’ve created an app with the data connected to a Google Sheets spreadsheet. I’ve read the documentation about private tables and tried to follow the instructions to make sure that each user gets a blank slate and can’t see data filled in by other users. But it hasn’t worked as of now.

Each logged in user can see all the data even though in Data>Tables>Shared? is set to off.

Please advise
Thanks