remove key from code

app.py

@@ -3,13 +3,14 @@ from llama_index.core import VectorStoreIndex, SimpleDirectoryReader, Settings
 from llama_index.embeddings.huggingface import HuggingFaceEmbedding
 from llama_index.legacy.callbacks import CallbackManager
 from llama_index.llms.openai_like import OpenAILike
+import os
 
 # Create an instance of CallbackManager
 callback_manager = CallbackManager()
 
 api_base_url =  "https://internlm-chat.intern-ai.org.cn/puyu/api/v1/"
 model = "internlm2.5-latest"
-api_key = "eyJ0eXBlIjoiSldUIiwiYWxnIjoiSFM1MTIifQ.eyJqdGkiOiI1MDE5NzIzMCIsInJvbCI6IlJPTEVfUkVHSVNURVIiLCJpc3MiOiJPcGVuWExhYiIsImlhdCI6MTczNjE1NzM5OCwiY2xpZW50SWQiOiJlYm1ydm9kNnlvMG5semFlazF5cCIsInBob25lIjoiMTc4MTE5NjU2MTgiLCJ1dWlkIjoiNmU4ZjEwZDYtNWJhZS00NmU2LWFlZDMtNzg3MWViNDMzMmFkIiwiZW1haWwiOiIiLCJleHAiOjE3NTE3MDkzOTh9.sw0QdqNBBBF_WHDBtNaTb12rmu3uhKlJzuWqRKxOD-RCZTdydao03TaTXY0EvXO4xPv-RWKgdBLloKMF4UgTUg"
+api_key = os.getenv("API_KEY")
 
 # api_base_url =  "https://api.siliconflow.cn/v1"
 # model = "internlm/internlm2_5-7b-chat"