use polygon::Polygon;
use polygon::query::Execute;
use polygon::rest::aggs;
#[tokio::main]
async fn main() -> Result<(), Box<dyn std::error::Error>> {
let client = Polygon::new()?
;
let result = aggs::previous_close(&client, "AAPL").get().await?;
println!("{:?}", result);
Ok(())
}