Update app.py

app.py

@@ -42,7 +42,7 @@ if __name__ == "__main__":
     API_KEY = os.getenv("DarkFantasyImageGeneratorApp")
 
     # Check if the key is retrieved correctly
-    if not api_key:
+    if not API_KEY:
         raise st.error("API Key not found.")
 
     # Initialize the InferenceClient