perf: speed-up musicDB load

sdgb-cli/src/main.rs

@@ -1,4 +1,7 @@
-use std::sync::atomic::{AtomicBool, Ordering};
+use std::{
+    io::stdout,
+    sync::atomic::{AtomicBool, Ordering},
+};
 
 use nyquest_preset::nyquest::ClientBuilder;
 use palc::Parser;
@@ -116,10 +119,17 @@ async fn main() -> Result<(), Box<dyn snafu::Error>> {
         }
         commands::Commands::QRLogin { ref qrcode_content } => {
             let qrcode = QRCode { qrcode_content };
-            match qrcode.login(&client).await {
+            let resp = qrcode.login(&client).await;
+
+            match &resp {
                 Ok(user_id) => info!("login succeed: {user_id}"),
                 Err(e) => error!("login failed: {e}"),
             }
+
+            if !human_readable {
+                let lock = stdout().lock();
+                serde_json::to_writer_pretty(lock, &resp)?;
+            }
         }
 
         commands::Commands::AuthLite { title_ver, variant } => {