diff --git a/.idea/workspace.xml b/.idea/workspace.xml
index c2771e14..9a9ceca4 100644
--- a/.idea/workspace.xml
+++ b/.idea/workspace.xml
@@ -4,8 +4,9 @@
     <option name="autoReloadType" value="SELECTIVE" />
   </component>
   <component name="ChangeListManager">
-    <list default="true" id="50f184fa-7bed-4956-baf5-7586ff26ea08" name="Changes" comment="aaa i forgor debug line">
+    <list default="true" id="50f184fa-7bed-4956-baf5-7586ff26ea08" name="Changes" comment="port a thing from chomens bot js to java">
       <change beforePath="$PROJECT_DIR$/.idea/workspace.xml" beforeDir="false" afterPath="$PROJECT_DIR$/.idea/workspace.xml" afterDir="false" />
+      <change beforePath="$PROJECT_DIR$/src/main/java/land/chipmunk/chayapak/chomens_bot/Bot.java" beforeDir="false" afterPath="$PROJECT_DIR$/src/main/java/land/chipmunk/chayapak/chomens_bot/Bot.java" afterDir="false" />
     </list>
     <option name="SHOW_DIALOG" value="false" />
     <option name="HIGHLIGHT_CONFLICTS" value="true" />
@@ -97,27 +98,6 @@
       <option name="presentableId" value="Default" />
       <updated>1680245437032</updated>
     </task>
-    <task id="LOCAL-00084" summary="add a working (or not?) stereo to music">
-      <created>1681885244617</created>
-      <option name="number" value="00084" />
-      <option name="presentableId" value="LOCAL-00084" />
-      <option name="project" value="LOCAL" />
-      <updated>1681885244617</updated>
-    </task>
-    <task id="LOCAL-00085" summary="improve and fix cmd handler (first commit on arch)&#10;yup this is my first commit on arch linux,.,.,..,.,.,&#10;yes i use arch btw :sunglasses:">
-      <created>1681972329495</created>
-      <option name="number" value="00085" />
-      <option name="presentableId" value="LOCAL-00085" />
-      <option name="project" value="LOCAL" />
-      <updated>1681972329498</updated>
-    </task>
-    <task id="LOCAL-00086" summary="1.19.4 + add stuff (kinda broken ..,,.)">
-      <created>1681984879688</created>
-      <option name="number" value="00086" />
-      <option name="presentableId" value="LOCAL-00086" />
-      <option name="project" value="LOCAL" />
-      <updated>1681984879688</updated>
-    </task>
     <task id="LOCAL-00087" summary="add/improve/fix stuff&#10;ig mabe mabe mabe&#10;useCore!1!1!">
       <created>1682060041610</created>
       <option name="number" value="00087" />
@@ -440,7 +420,28 @@
       <option name="project" value="LOCAL" />
       <updated>1682661022747</updated>
     </task>
-    <option name="localTasksCounter" value="133" />
+    <task id="LOCAL-00133" summary="use block change and multi block change packets&#10;and also change the core refill delay !!!">
+      <created>1682669397179</created>
+      <option name="number" value="00133" />
+      <option name="presentableId" value="LOCAL-00133" />
+      <option name="project" value="LOCAL" />
+      <updated>1682669397180</updated>
+    </task>
+    <task id="LOCAL-00134" summary="actually i forgor 1 thing&#10;its the command block update thing which we want to ignore it">
+      <created>1682672738932</created>
+      <option name="number" value="00134" />
+      <option name="presentableId" value="LOCAL-00134" />
+      <option name="project" value="LOCAL" />
+      <updated>1682672738933</updated>
+    </task>
+    <task id="LOCAL-00135" summary="port a thing from chomens bot js to java">
+      <created>1682673335875</created>
+      <option name="number" value="00135" />
+      <option name="presentableId" value="LOCAL-00135" />
+      <option name="project" value="LOCAL" />
+      <updated>1682673335876</updated>
+    </task>
+    <option name="localTasksCounter" value="136" />
     <servers />
   </component>
   <component name="Vcs.Log.Tabs.Properties">
@@ -455,9 +456,6 @@
     </option>
   </component>
   <component name="VcsManagerConfiguration">
-    <MESSAGE value="actually revert greplog update because it breaks stuff" />
-    <MESSAGE value="add filter (ignore messy code plz)" />
-    <MESSAGE value="fix chat (/say and /me) i guess" />
     <MESSAGE value="actually fix the fix&#10;the first &quot;fix&quot; is just fix like just fix,..,&#10;then the second one is the last commit, &quot;fix chat (/say and /me) i guess&quot;" />
     <MESSAGE value="fix test?" />
     <MESSAGE value="fix extras chat" />
@@ -480,7 +478,10 @@
     <MESSAGE value="patch sus?" />
     <MESSAGE value="add command suggestions i guess" />
     <MESSAGE value="aaa i forgor debug line" />
-    <option name="LAST_COMMIT_MESSAGE" value="aaa i forgor debug line" />
+    <MESSAGE value="use block change and multi block change packets&#10;and also change the core refill delay !!!" />
+    <MESSAGE value="actually i forgor 1 thing&#10;its the command block update thing which we want to ignore it" />
+    <MESSAGE value="port a thing from chomens bot js to java" />
+    <option name="LAST_COMMIT_MESSAGE" value="port a thing from chomens bot js to java" />
   </component>
   <component name="XSLT-Support.FileAssociations.UIState">
     <expand />
diff --git a/src/main/java/land/chipmunk/chayapak/chomens_bot/Bot.java b/src/main/java/land/chipmunk/chayapak/chomens_bot/Bot.java
index eee46278..e76c5405 100644
--- a/src/main/java/land/chipmunk/chayapak/chomens_bot/Bot.java
+++ b/src/main/java/land/chipmunk/chayapak/chomens_bot/Bot.java
@@ -118,7 +118,7 @@ public class Bot {
 
         final String _username = options.username();
 
-        if (_username == null) username = RandomStringUtils.randomAlphabetic(8);
+        if (_username == null) username = RandomStringUtils.randomAlphanumeric(8);
         else username = _username;
 
         Session session = new TcpClientSession(host, port, new MinecraftProtocol(username), null);