Fix Kubernetes namespaces for dotted usernames

routes/servers.py

@@ -6,6 +6,7 @@ from flask import Blueprint, jsonify, request
 import json
 from urllib.parse import urlsplit
 from kubernetes_service import k8s_manager
+from namespace_utils import user_namespace
 import requests
 from werkzeug.utils import secure_filename
 from runtime_config import (
@@ -379,7 +380,7 @@ def download_plugin_to_server():
                     plugin_response.close()
 
             # Upload to server
-            namespace = f"user-{user['username']}".lower()
+            namespace = user_namespace(user['username'])
             pods = k8s_manager.get_pods_for_server(namespace, server_id)
 
             if not pods: