Update app.py

app.py

@@ -1,3 +1,6 @@
+import os
+
+HF_TOKEN = os.getenv("HF_TOKEN")
 from smolagents import Tool, FinalAnswerTool, ToolCallingAgent, DuckDuckGoSearchTool, tool, LiteLLMModel, PythonInterpreterTool
 import datetime
 import requests
@@ -34,7 +37,10 @@ def sub_tool(a: float, b: float) -> float:
 
 final_answer = FinalAnswerTool()
 
-model = LiteLLMModel(model_id="huggingface/google/gemma-2-2b-it")
+model = LiteLLMModel(
+    model_id="huggingface/google/gemma-2-2b-it",
+    api_key=HF_TOKEN
+)
 
 agent = ToolCallingAgent(
     tools=[sum_tool, sub_tool, PythonInterpreterTool()],