How to find out the balance of qiwi wallet through api?

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How to check the balance through node qiwi api? I redid a lot, searched on the internet, couldn't find anything, help, here is my error code:

vk.updates.hear(/^text/, async (msg) => {
    callbackWallet.getBalance((errorCode, data) => {
    msg.send(` Баланс QIWI: ${balance.accounts[0].balance.amount} ₽`)
    })
});