When writing a music bot, an error appeared discord.ext.commands.errors.MissingRequiredArgument: url is a required argument that is missing. what to do?

Question

Python

Here is the code

import discord
from discord.ext import commands,tasks
import os
from dotenv import load_dotenv
from discord.utils import get
from discord import FFmpegPCMAudio
from discord import TextChannel
import youtube_dl
import json
import requests
from config import settings

load_dotenv()

DISCORD_TOKEN = os.getenv("discord_token")
intents = discord.Intents().all()
client = discord.Client(intents=intents)
bot = commands.Bot(command_prefix = settings['prefix'])

youtube_dl.utils.bug_reports_message = lambda: ''

ytdl_format_options = {
    'format': 'bestaudio/best',
    'restrictfilenames': True,
    'noplaylist': True,
    'nocheckcertificate': True,
    'ignoreerrors': False,
    'logtostderr': False,
    'quiet': True,
    'no_warnings': True,
    'default_search': 'auto',
    'source_address': '0.0.0.0'
}

ffmpeg_options = {
    'options': '-vn'
}

ytdl = youtube_dl.YoutubeDL(ytdl_format_options)

class YTDLSource(discord.PCMVolumeTransformer):
    def __init__(self, source, *, data, volume=0.5):
        super().__init__(source, volume)
        self.data = data
        self.title = data.get('title')
        self.url = ""

    @classmethod
    async def from_url(cls, url, *, loop=None, stream=False):
        loop = loop or asyncio.get_event_loop()
        data = await loop.run_in_executor(None, lambda: ytdl.extract_info(url, download=not stream))
        if 'entries' in data:
            data = data['entries'][0]
        filename = data['title'] if stream else ytdl.prepare_filename(data)
        return filename

@bot.command(name='join', help='Приглашает бота в голсовой канал')
async def join(ctx):
    if not ctx.message.author.voice:
        await ctx.send("{} не подключен к голосовому каналу".format(ctx.message.author.name))
        return
    else:
        channel = ctx.message.author.voice.channel
    await channel.connect()
    
@bot.command(name='leave', help='выпинываем бота')
async def leave(ctx):
    voice_client = ctx.message.guild.voice_client
    if voice_client.is_connected():
        await voice_client.disconnect()
    else:
        await ctx.send("Бот не подключен к голосовому каналу.")

@bot.command(name='play', help='Чтобы воспроизвести песню')
async def play(ctx,url):
    try :
        server = ctx.message.guild
        voice_channel = server.voice_client
        async with ctx.typing():
            filename = await YTDLSource.from_url(url, loop=bot.loop)
            voice_channel.play(discord.FFmpegPCMAudio(executable="ffmpeg.exe", source=filename))
        await ctx.send('**Сейчас играет:** {}'.format(filename))
    except:
        await ctx.send("Что-то пошло не так xd")

@bot.command(name='resume', help='Возобновляет песню')
async def resume(ctx):
    voice_client = ctx.message.guild.voice_client
    if voice_client.is_paused():
        await voice_client.resume()
    else:
        await ctx.send("До этого бот ничего не играл. Используйте команду play")
        
@bot.command(name='stop', help='Останавливает песню')
async def stop(ctx):
    voice_client = ctx.message.guild.voice_client
    if voice_client.is_playing():
        await voice_client.stop()
    else:
        await ctx.send("Бот в данный момент молчит.")

bot.run(settings['token'])