diff --git a/Merge/front/src/api/posts_trm.js b/Merge/front/src/api/posts_trm.js
index 8f7e877..2c0fc14 100644
--- a/Merge/front/src/api/posts_trm.js
+++ b/Merge/front/src/api/posts_trm.js
@@ -218,7 +218,11 @@
  * @returns Promise<[ {id, gpu_id, gpu_usage, gpu_memory_usage, timestamp}, … ]>
  */
 export async function fetchGpuUsage(limit = 100) {
-  const token = localStorage.getItem('token')
+  const token = getAuthToken()
+  if (!token || token === 'null') {
+    throw new Error('Token not found or invalid. Please login again.')
+  }
+  
   const res = await fetch(`http://10.126.59.25:8082/gpu-usage?limit=${limit}`, {
     method: 'GET',
     headers: {