Update app.py

app.py

@@ -9,6 +9,10 @@ API_TOKEN = os.environ.get("HF_TOKEN")  # Get from environment # Replace with yo
 MAX_TOKENS = 150
 CACHE_TTL = 3600  # 1 hour cache
 
+#Validate API key
+if not API_TOKEN:
+    raise gr.Error("API_KEY environment variable not set!")
+    
 # Initialize response cache
 response_cache = TTLCache(maxsize=100, ttl=CACHE_TTL)