Discord бот на python

 @bot.command(name='unban') 
async def unban(ctx, member : discord.Member, *, reason = None): 
    limba = 1 
    await ctx.channel.purge(limit = limba) # Это просто удаление твоего сообщения.
    await guild.unban(reason = reason) 
    await ctx.send(f'Пользователь {member} был успешно разбанен') 

 Traceback (most recent call last): 
  File "C:\Users\maxim\AppData\Local\Programs\Python\Python312\Lib\site-packages\discord\ext\commands\bot.py", line 1366, in invoke 
    await ctx.command.invoke(ctx) 
  File "C:\Users\maxim\AppData\Local\Programs\Python\Python312\Lib\site-packages\discord\ext\commands\core.py", line 1021, in invoke 
    await self.prepare(ctx) 
  File "C:\Users\maxim\AppData\Local\Programs\Python\Python312\Lib\site-packages\discord\ext\commands\core.py", line 938, in prepare 
    await self._parse_arguments(ctx) 
  File "C:\Users\maxim\AppData\Local\Programs\Python\Python312\Lib\site-packages\discord\ext\commands\core.py", line 845, in _parse_arguments 
    transformed = await self.transform(ctx, param, attachments) 
                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ 
  File "C:\Users\maxim\AppData\Local\Programs\Python\Python312\Lib\site-packages\discord\ext\commands\core.py", line 715, in transform 
    return await run_converters(ctx, converter, argument, param)  # type: ignore 
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ 
  File "C:\Users\maxim\AppData\Local\Programs\Python\Python312\Lib\site-packages\discord\ext\commands\converter.py", line 1400, in run_converters 
    return await _actual_conversion(ctx, converter, argument, param) 
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ 
  File "C:\Users\maxim\AppData\Local\Programs\Python\Python312\Lib\site-packages\discord\ext\commands\converter.py", line 1282, in _actual_conversion 
    return await converter().convert(ctx, argument) 
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ 
  File "C:\Users\maxim\AppData\Local\Programs\Python\Python312\Lib\site-packages\discord\ext\commands\converter.py", line 276, in convert 
    raise MemberNotFound(argument) 
discord.ext.commands.errors.MemberNotFound: Member "Arcane#7800" not found.