:bug: Resolve issues with access token

backend/data_loader.py

@@ -14,6 +14,7 @@ def load_leaderboard_data() -> Dataset:
     Load leaderboard data from HuggingFace dataset.
     """
     print(f"Loading dataset: {RESULTS_DATASET}")
+    print(f"Using HF token: {'Yes' if HF_TOKEN else 'No'}")
 
     # Load the dataset (token already set globally via login in settings)
     dataset = load_dataset(RESULTS_DATASET)

config/settings.py

@@ -18,7 +18,12 @@ if not HF_TOKEN:
     print("⚠️  Warning: HF_TOKEN not found. Please set it in .env (local) or Spaces Secrets (server)")
 else:
     print("✅ HF_TOKEN loaded successfully")
-    login(token=HF_TOKEN, add_to_git_credential=False)
+    print(f"🔍 Token length: {len(HF_TOKEN)} characters")
+    try:
+        login(token=HF_TOKEN, add_to_git_credential=False)
+        print("✅ HuggingFace login successful")
+    except Exception as e:
+        print(f"⚠️  HuggingFace login failed: {e}")
 
 # Dataset Repositories
 REQUESTS_DATASET = f"{HUGGINGFACE_ORG}/tox21-requests"