Update bot_management.py

src/cogs/bot_management.py

@@ -19,6 +19,14 @@ class BotManager:
             except:
                 pass
             
+    async def on_member_remove(self, member):
+        # If the member is not a bot
+        if member.bot is False:
+            return
+        else:
+            # The member is a bot
+            await self.bot.db_con.execute('DELETE FROM bots WHERE id = $1', member.id)
+
     @commands.command()
     async def invite(self, ctx, bot=None, prefix=None):
         bot = await ctx.bot.get_user_info(bot)