Getting voice adapter with @discordjs/core

app.post('/play', async c => {
    let { url, user, guild } = Object.fromEntries(await c.req.formData()) as {
        url: string
        user: string
        guild: string | APIGuild
    }
    guild = await client.api.guilds.get(guild as string) as APIGuild
    if (!url || !user || !guild) {
        c.status(400)
        return c.json({ success: false, message: 'No url, user, or guild provided' })
    }
    const state = voiceStates.get(user as string)
    if (!state) {
        c.status(400)
        return c.json({ success: false, message: 'User not in a voice channel' })
    }
    const channel = await client.api.channels.get(state) as APITextChannel
    joinVoiceChannel({
        channelId: channel.id,
        guildId: guild.id,
        adapterCreator: guild.voiceAdapterCreator as DiscordGatewayAdapterCreator,
        selfDeaf: true,
    })
})

app.post('/play', async c => {
    let { url, user, guild } = Object.fromEntries(await c.req.formData()) as {
        url: string
        user: string
        guild: string | APIGuild
    }
    guild = await client.api.guilds.get(guild as string) as APIGuild
    if (!url || !user || !guild) {
        c.status(400)
        return c.json({ success: false, message: 'No url, user, or guild provided' })
    }
    const state = voiceStates.get(user as string)
    if (!state) {
        c.status(400)
        return c.json({ success: false, message: 'User not in a voice channel' })
    }
    const channel = await client.api.channels.get(state) as APITextChannel
    joinVoiceChannel({
        channelId: channel.id,
        guildId: guild.id,
        adapterCreator: guild.voiceAdapterCreator as DiscordGatewayAdapterCreator,
        selfDeaf: true,
    })
})