Update app.py

app.py

@@ -9,13 +9,13 @@ import os
 import chainlit as cl
 
 # Load environment variables from .env file
-load_dotenv()
 
+api_key = os.getenv('OPENAI_API_KEY')
 
 @cl.on_chat_start
 async def start_llm():
     llm = ChatOpenAI(model='gpt-4o-mini',
-                 temperature=0.5)
+                 temperature=0.5, api_key = api_key)
     conversation_memory = ConversationBufferMemory(memory_key="chat_history",
                                                    max_len=50,
                                                    return_messages=True,