How to use the tinify.compressionCount function in tinify

tinify.validate(function(err) {
      if (err) {
        reject(new TinyPngValidateError())
      }

      const compressionsThisMonth = tinify.compressionCount
      if (compressionsThisMonth + images.length > 500) {
        console.log(
          colors.red("compressions this month is over follow (> 500).")
        )
      } else {
        const left = 500 - compressionsThisMonth
        console.log(colors.yellow("compressions this month left " + left))
      }

      resolve("tinyPng is valid.")
    })
  })

const checkCompressionCount = (count = 0)=> {
    return (500 - tinify.compressionCount - count) >> 0;
}