Update app.py

app.py

@@ -29,7 +29,7 @@ def ui():
 
     api_key = st.text_input('Enter your OpenAI key here: ')
     if api_key is not None:
-        s.environ["OPENAI_API_KEY"] = api_key
+        os.environ["OPENAI_API_KEY"] = api_key
         openai.api_key = os.environ["OPENAI_API_KEY"]
         logging.basicConfig(stream=sys.stdout, level=logging.INFO)
         logging.getLogger().addHandler(logging.StreamHandler(stream=sys.stdout))