Filter using User Settings

[Savenx]

Hello i read this article here: User Settings: Appropriate Use and Limitations | AppSheet Help Center

But one question remains… How can i make this filter, like in this picture?

"* Your app has data analytics for ten different countries. Ask the user to select a country via the User Settings, and filter the data (via a Security Filter or Slice) to show just the appropriate information for that country. "

How can i achieve doin this by Slice Filter?