[ISSUE #5190]remove the unnecessary catch in the login method (#5456)

* remove the unnecessary catch in the login method

* catch the throwable error when login and print the message

client/src/main/java/com/alibaba/nacos/client/security/SecurityProxy.java

@@ -114,7 +114,8 @@ public class SecurityProxy {
                     return true;
                 }
             }
-        } catch (Throwable ignore) {
+        } catch (Throwable throwable) {
+            SECURITY_LOGGER.warn("[SecurityProxy] login failed, error: ", throwable);
         }
         
         return false;