discord.py-rewrite -如何覆盖和更改特定用户的冷却时间？

from discord.ext import commands

bot = commands.Bot(command_prefix='!')

@bot.command()
@commands.cooldown(1, 60, commands.BucketType.user)
async def my_command(ctx):
    await ctx.send('This command has a cooldown of 60 seconds per user.')

@my_command.error
async def my_command_error(ctx, error):
    if isinstance(error, commands.CommandOnCooldown):
        await ctx.send(f'This command is on cooldown. Please wait {error.retry_after:.2f} seconds.')

bot.run('your_token')