Update app.py

app.py

@@ -7,6 +7,10 @@ from smolagents import CodeAgent, DuckDuckGoSearchTool, HfApiModel, load_tool, t
 from tools.final_answer import FinalAnswerTool
 from Gradio_UI import GradioUI
 
+api_key = os.getenv("ALPHAVANTAGE")
+if not api_key:
+    raise ValueError("\u26a0\ufe0f Key is missing! Add it as a Secret in Hugging Face Spaces.")
+
 # Define a tool to retrieve the Discounted Cash Flow (DCF) of a company
 @spaces.GPU
 @tool