Add authentication section to collection cloning

app.py

@@ -40,6 +40,7 @@ with gr.Blocks() as demo:
 This space allows you to clone a <a href="https://huggingface.co/docs/hub/collections">Collection</a> from the Hugging Face Hub into your own namespace.
 You can then edit the collection to your liking!</p>"""
     )
+    gr.Markdown("## Authentication")
     gr.Markdown(
         "Token is required to create a new collection and clone private collections. You can get your token from your [profile page](https://huggingface.co/settings/token)."
     )
@@ -51,7 +52,7 @@ You can then edit the collection to your liking!</p>"""
     with gr.Column():
         gr.Markdown("## Source Collection")
         source_slug = gr.Textbox(
-            label="Source Collection Slug",
+            label="Source Collection Slug", placeholder="e.g. username/collection-slug"
         )
         gr.Markdown("## Destination Collection info")
         dest_namespace = gr.Textbox(
@@ -61,7 +62,6 @@ You can then edit the collection to your liking!</p>"""
         dest_title = gr.Textbox(
             label="Destination Title",
         )
-
         with gr.Row():
             private = gr.Checkbox(
                 False,