1. install the aforementioned nuget package

2. Create the builder:

   type Program = class end
   
   [<EntryPoint>]
   let main _ =
       let config =
           ConfigurationBuilder()
               .AddUserSecrets<Program>() 
               .Build()
   
       // config["secrets:your-secret"] 
       0
   

Why do you need a Program class? Shoud we not write idiomatic F#?

F# CLI apps typically just use modules and keep it clean and functional. But AddUserSecrets() expects a class or a type.