How to use the fingerprintjs2.x64hash128 function in fingerprintjs2

return Fingerprint2.getPromise({}).then(components => {
    const values = components.map(component => component.value)
    const hash = `V1-${Fingerprint2.x64hash128(values.join(''), 31)}`

    // Select the browser properties to export along with the fingerprint.
    const browserProps = {}
    components
      .filter(x => browserPropsWhitelist.includes(x.key))
      .forEach(x => (browserProps[x.key] = x.value))
    cachedFingerprintData = { fingerprint: hash, ...browserProps }
  })
}

Fingerprint2.get(options, (components) => {
          var values = components.map(function (component) { return component.value });
          var murmur = Fingerprint2.x64hash128(values.join(''), 31);
          nookies.set({}, 'fp', murmur, {
            maxAge: 30 * 24 * 60 * 60,
            path: '/',
          });
          this.getSession(murmur);
      });
    } else {

async function generate() {
  try {
    const components = await Fp2.getPromise()
    const values = components.map(({ value }) => value)
    cfp = Fp2.x64hash128(values.join(''), 31)
    log.log('generate cfp', cfp)
  } catch (e) {
    log.error('failed to generate cfp', e)
  }
}