如何让discord.py机器人添加天狼星符号以及mod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('Bot is ready.')

@bot.command()
async def add_symbol(ctx):
    symbol = '\u1F31F'  # 天狼星符号的Unicode码
    await ctx.send(f'添加天狼星符号：{symbol}')

@bot.command()
async def add_mod_role(ctx, member: discord.Member):
    guild = ctx.guild
    role = await guild.create_role(name='Mod', permissions=discord.Permissions(administrator=True))
    await member.add_roles(role)
    await ctx.send(f'已将用户 {member.mention} 分配为 Mod 角色。')

bot.run('YOUR_BOT_TOKEN')