Discord.py bota rol gerektiren komut nasıl yapılır?

@tree.command(name = 'mines', description='mines game mode')
async def mines(interaction: discord.Interaction, tile_amt: int, round_id : str):
     if not discord.utils.get(em.author.roles, name='yetkili rol adı'):
      em.add_field(name='Error', value="Invalid round id")
      await interaction.response.send_message(embed=em)
      return
  
     if len(round_id) == 36:
        start_time = time.time()
        grid = ['','','','','','','','','','','','','','','','','','','','','','','','','']
        already_used = []
        count = 0
        while tile_amt > count:
            a = random.randint(0, 24)
            if a in already_used:
                continue
            already_used.append(a)
            grid[a] = ''
            count += 1
      
        chance = random.randint(45,95)
        if tile_amt < 4:
            chance = chance - 15
        em = discord.Embed(color=0x0025ff)
        em.add_field(name='Grid', value="\n" + "```"+grid[0]+grid[1]+grid[2]+grid[3]+grid[4]+"\n"+grid[5]+grid[6]+grid[7]+grid[8]+grid[9]+"\n"+grid[10]+grid[11]+grid[12]+grid[13]+grid[14]+"\n"+grid[15]+grid[16]+grid[17] \
            +grid[18]+grid[19]+"\n"+grid[20]+grid[21]+grid[22]+grid[23]+grid[24] + "```\n" + f"**Accuracy**\n```{chance}%```\n**Round ID**\n```{round_id}```\n**Response Time:**\n```{str(int(time.time() - int(start_time)))}```")
        em.set_footer(text='made by PinkShop')
        await interaction.response.send_message(embed=em)
     else:
        em = discord.Embed(color=0xff0000)
        em.add_field(name='Error', value="Invalid round id")
        await interaction.response.send_message(embed=em)