(Discord.py)如何创建一个命令来为您提供指定的角色？

import discord
from discord.ext import commands

intents = discord.Intents.default()
intents.members = True

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

@bot.event
async def on_ready():
    print(f'{bot.user.name} has connected to Discord!')

@bot.command()
async def giverole(ctx, role_name: str):
    role = discord.utils.get(ctx.guild.roles, name=role_name)
    if role is not None:
        await ctx.author.add_roles(role)
        await ctx.send(f'You have been given the {role_name} role.')
    else:
        await ctx.send(f'The {role_name} role does not exist.')

bot.run('YOUR_BOT_TOKEN')