python discord bot join voice channel

@bot.command()
async def join(ctx):
    channel = ctx.author.voice.channel
    await channel.connect()
@bot.command()
async def leave(ctx):
    await ctx.voice_client.disconnect()

@client.command()
async def join(ctx):
    channel = ctx.author.voice.channel
    await channel.connect()
    
@client.command()
async def leave(ctx):
    await ctx.voice_client.disconnect()