Fixed crash when exit

src/main/java/org/saturnclient/saturnclient/auth/Auth.java

@@ -117,17 +117,22 @@ public class Auth {
     private static void startPingThread() {
         pingThread = new Thread(() -> {
             try {
-                while (running) {
+                while (running && !Thread.currentThread().isInterrupted()) {
+                    try {
                         Thread.sleep(25000); // 25 seconds
                         if (running) {
                             Network.write("ping");
                         }
-                }
                     } catch (InterruptedException e) {
-                SaturnClient.LOGGER.warn("Ping thread interrupted", e);
+                        Thread.currentThread().interrupt(); // Restore interrupt status
+                        break; // Exit the loop on interruption
+                    }
+                }
             } catch (Exception e) {
+                if (!(e instanceof InterruptedException)) {
                     SaturnClient.LOGGER.error("Error in ping thread", e);
                 }
+            }
         });
 
         pingThread.setDaemon(true);