Update app.py

app.py

@@ -106,7 +106,7 @@ if api_key:
     ]
 
     document_content_description = "Type of a document"
-    llm = ChatOpenAI(temperature=0)
+    llm = ChatOpenAI(temperature=0, api_key=api_key)
 
     retriever = SelfQueryRetriever.from_llm(
         llm,