fixed wrong method call

src/main/java/server/ExpLogger.java

@@ -65,7 +65,7 @@ public class ExpLogger {
 
 
     private static void startExpLogger() {
-        schdExctr.schedule(saveExpLoggerToDBRunnable, EXP_LOGGER_THREAD_SLEEP_DURATION_SECONDS, SECONDS);
+        schdExctr.scheduleWithFixedDelay(saveExpLoggerToDBRunnable, EXP_LOGGER_THREAD_SLEEP_DURATION_SECONDS, EXP_LOGGER_THREAD_SLEEP_DURATION_SECONDS, SECONDS);
         Runtime.getRuntime().addShutdownHook(new Thread(() -> {
            stopExpLogger();
         }));
@@ -90,4 +90,4 @@ public class ExpLogger {
             startExpLogger();
         }
     }
-}
+}