Update app.py

app.py

@@ -50,7 +50,7 @@ with gr.Blocks(title="Submit your assignment!") as demo:
 
         with gr.Column():
             source = gr.Textbox(label='Source repository', placeholder="Source repository (e.g. lysandre/submission)")
-            token = gr.Textbox(label='Read token', placeholder="Read access token")
+            token = gr.Textbox(label='Read token', placeholder="Read access token", type="password")
             with gr.Row():
                 button = gr.Button("Submit", variant="primary")