Add logging when we refresh a token to see if it ever works

src/monzo.rs

@@ -73,6 +73,7 @@ pub async fn monzo_client_freshened(
     drop(state_inner);
     let needs_refresh = exp_at_instant < SystemTime::now();
     if needs_refresh {
+        eprintln!("Refreshing token.");
         let client = reqwest::Client::new();
         let auth_resp: MonzoAuthResponse = client
             .post("https://api.monzo.com/oauth2/token")