Update app.py

app.py

@@ -36,7 +36,7 @@ if st.session_state["story_started"]:
     user_input = st.text_input("Add your sentence:")
     if st.button("Submit"):
         # การเรียกใช้ API ตามโครงสร้างใหม่
-        response = openai.ChatCompletion.create(
+        response = client.chat.completions.create(
             model="gpt-4o-mini",
             messages=[
                 {"role": "system", "content": "You are a storytelling assistant who helps children write fun and imaginative stories."},