add method to get vanity url by steamid

examples/get.rs

@@ -0,0 +1,20 @@
+use std::env::args;
+use steam_resolve_vanity::get_vanity_url;
+
+#[tokio::main]
+async fn main() -> Result<(), Box<dyn std::error::Error>> {
+    let mut args = args();
+    let binary = args.next().unwrap(); // first argument is binary
+
+    if let Some(steam_id) = args.next() {
+        if let Some(vanity) = get_vanity_url(steam_id.parse()?).await? {
+            println!("{}", vanity);
+        } else {
+            println!("No vanity found for steamid");
+        }
+    } else {
+        eprintln!("usage {} <vanity>", binary);
+    }
+
+    Ok(())
+}