Update app.py

app.py

@@ -9,6 +9,9 @@ from chainlit.playground.providers import ChatOpenAI  # importing ChatOpenAI too
 from dotenv import load_dotenv
 
 load_dotenv()
+import os
+
+api_key = os.getenv("OPENAI_API_KEY")
 
 # ChatOpenAI Templates
 system_template = """You are a helpful assistant who always speaks in a pleasant tone!