Update app.py

app.py

@@ -9,7 +9,7 @@ from mistralai.models.chat_completion import ChatMessage
 For more information on `huggingface_hub` Inference API support, please check the docs: https://huggingface.co/docs/huggingface_hub/v0.22.2/en/guides/inference
 """
 #client = InferenceClient("HuggingFaceH4/zephyr-7b-beta")
-client = MistralClient(api_key=mistral_api_key)
+client = MistralClient(api_key= os.getenv('mistral_api_key'))
 
 
 # Function to get chat response