Update app.py

app.py

@@ -40,7 +40,7 @@ final_answer = FinalAnswerTool()
 # If the agent does not answer, the model is overloaded, please use another model or the following Hugging Face Endpoint that also contains qwen2.5 coder:
 # model_id='https://pflgm2locj2t89co.us-east-1.aws.endpoints.huggingface.cloud' 
 
-model = LiteLLMModel(model_id="gemini/gemini-1.5-flash",  api_key=os.environ["GOOGLE_API_KEY"])
+model = LiteLLMModel(model_id="gemini/gemini-1.5-flash",  api_key=os.getenv('GOOGLE_API_KEY'))
 
 # Import tool from Hub
 #image_generation_tool = load_tool("agents-course/text-to-image", trust_remote_code=True)