Update app.py

app.py

@@ -140,7 +140,7 @@ with gr.Blocks() as demo:
         To permanently set the key, go to Settings -> Variables and secrets -> Secrets, 
         then replace OPENAI_API_KEY value with whatever openai key of the instructor.
         """
-        api_input = os.environ.get("OPENAI_API_KEY")
+        api_input = gr.Textbox(show_label=False, type="password", visible=False, value=os.environ.get("OPENAI_API_KEY"))
 
         # Upload secret prompt functionality
         # The instructor will provide a secret prompt/persona to the tutor