Update app.py

app.py

@@ -12,9 +12,8 @@ from aimakerspace.vectordatabase import VectorDatabase
 from aimakerspace.openai_utils.chatmodel import ChatOpenAI
 import chainlit as cl
 
-# Get OpenAI API key from environment variables
-openai_api_key = os.getenv("OPENAI_API_KEY")
-if not openai_api_key:
+# Ensure OpenAI API key is set in environment variables
+if not os.getenv("OPENAI_API_KEY"):
     raise ValueError("OPENAI_API_KEY environment variable is not set")
 
 system_template = """\
@@ -116,8 +115,8 @@ async def on_chat_start():
     vector_db = VectorDatabase()
     vector_db = await vector_db.abuild_from_list(texts)
     
-    # Initialize ChatOpenAI with API key from environment variable
-    chat_openai = ChatOpenAI(api_key=openai_api_key)
+    # Initialize ChatOpenAI (API key will be automatically picked up from environment variable)
+    chat_openai = ChatOpenAI()
 
     # Create a chain
     retrieval_augmented_qa_pipeline = RetrievalAugmentedQAPipeline(