Rust fs::create_dir_all() doesn't throw an error, but also does not work

I’m new to rust, so maybe I’m not understanding this correctly. I am creating a multiplatform application using Tauri + Yew. In my backend code when I’m setting up the app, I wanted to create a directory in the $DOCUMENT directory, for projects made inside my application.

The result for fs::create_dir_all("$DOCUMENT/QueryIOProjects"); is Ok() and it prints Projects Directory created at /Users/username/Documents/QueryIOProjects, but I cant see any folder in Finder or via terminal. To debug, I used the read_dir method to print all the DirEntrys,which prints out only one output dirEntry = QueryIOProjects, leaving me even more confused.

Other relavant info :
OS: MacOS Ventura 13.0.1
Chip: Apple M1 Pro

src-tauri/src/main.rs:

    tauri::Builder::default()
    .invoke_handler(tauri::generate_handler![greet])
    .menu(menu)
    .on_menu_event(menu_item_handler)
    .setup(|app| {
        let path_str = match path::parse(
            &app.config(),
            app.package_info(),
            &app.env(),
            "$DOCUMENT/QueryIOProjects",
        ) {
            Ok(path) => path.to_string_lossy().to_string(),
            Err(_) => "Path creation failed".to_string(),
        };
        {
            let result = fs::create_dir_all("$DOCUMENT/QueryIOProjects");
            match result {
                Ok(_) => println!("Projects Directory created at {}", path_str),
                Err(_) => println!("Failed to create project directory at {}", path_str),
            }
        }
        {
            let result = fs::read_dir("$DOCUMENT/");
            match result {
                Ok(readDir) => {
                    readDir.for_each(|dirEntryResult|{ 
                        match dirEntryResult {
                            Ok(dirEntry) => println!("dirEntry = {}", dirEntry.file_name().into_string().expect("dir entry string conversion failed")),
                            Err(err) => println!("error in dirEntry"),
                        }
                    });
                },
                Err(_) => println!("Failed to read directory at {}", "$DOCUMENT/"),
            }
        }
        Ok(())
    })
    .run(tauri::generate_context!())
    .expect("error while running tauri application");

tauri.conf.json:

  "tauri": {
"allowlist": {
  "all": false,
  "shell": {
    "all": false,
    "open": true
  },
  "fs": {
    "scope": ["$DOCUMENT","$DOCUMENT/*"],
    "all": true,
    "readFile": true,
    "writeFile": true,
    "readDir": true,
    "copyFile": true,
    "createDir": true,
    "removeFile": true,
    "renameFile": true,
    "exists": true
  },
  "path": {
    "all": true
  },
  "dialog": { 
    "open": true, 
    "save": true 
  }
}

>Solution :

You are creating the folder at the literal path "$DOCUMENT/QueryIOProjects", not path_str. Somewhere on your computer is a folder called, literally, $DOCUMENT.