url parameter failure for making a new vote

on_reaction_add Traceback (most recent call last): File "/usr/local/lib/python3.8/dist-packages/discord/client.py", line 409, in _run_event await coro(*args, **kwargs) File "/home/ubuntu/ops-bot-ii/src/cogs/voting.py", line 80, in on_reaction_add await user.send(self.url) AttributeError: 'voting' object has no attribute 'url'