fix

app.py

@@ -49,8 +49,8 @@ class DMButton(Button):
 async def send_button(ctx):
     if ctx.author.id == 811235357663297546:
         unique_string = generate_unique_string()
-        user_tokens[user.id] = unique_string
-        unique_link = f"{GRADIO_APP_URL}?user_id={user.id}&token={unique_string}"
+        user_tokens[ctx.author.id] = unique_string
+        unique_link = f"{GRADIO_APP_URL}?user_id={ctx.author.id}&token={unique_string}"
         button = DMButton(label="Verify Discord Account", style=discord.ButtonStyle.primary, message=f"To complete the verification process, visit this link and click the 'sign in with Hugging Face' button: {unique_link}")
         view = View()
         view.add_item(button)