bin/verify-token: Use clap for CLI argument parsing

Author: Turbo87

src/bin/verify-token.rs

@@ -1,14 +1,23 @@
-// Look up a username by API token. Used by staff to verify someone's identity
-// by having an API token given. If an error occurs, including being unable to
-// find a user with that API token, the error will be displayed.
-
 use cargo_registry::{db, models::User, util::errors::AppResult};
-use std::env;
+
+use clap::Clap;
+
+#[derive(Clap, Debug)]
+#[clap(
+    name = "verify-token",
+    about = "Look up a username by API token. Used by staff to verify someone's identity \
+        by having an API token given. If an error occurs, including being unable to \
+        find a user with that API token, the error will be displayed."
+)]
+struct Opts {
+    api_token: String,
+}
 
 fn main() -> AppResult<()> {
+    let opts: Opts = Opts::parse();
+
     let conn = db::connect_now()?;
-    let token = env::args().nth(1).expect("API token argument required");
-    let user = User::find_by_api_token(&conn, &token)?;
+    let user = User::find_by_api_token(&conn, &opts.api_token)?;
     println!("The token belongs to user {}", user.gh_login);
     Ok(())
 }