Missing event argument fix

rocketbot/cogs/logcog.py

 		await bot_message.update()
 
 	@commands.Cog.listener()
-	async def on_member_ban(self, user: Union[User, Member]) -> None:
+	async def on_member_ban(self, guild: Guild, user: Union[User, Member]) -> None:
 		"""
 		Called when user gets banned from a Guild.
 
 		https://discordpy.readthedocs.io/en/stable/api.html#discord.on_member_ban
 		"""
-		if hasattr(user, 'guild'):
-			guild = user
-		else:
-			return
-		guild = user.guild
 		if not self.get_guild_setting(guild, self.SETTING_ENABLED):
 			return
 		banner = None