我尝试使用apolloclient和GraphQL上传文件，我得到GraphQL错误：createReadStream不是函数。不知道如何修复

Mutation: {
        uploadFile: async (parent, { file }) => {
            const { createReadStream, filename, mimetype, encoding } = await file

            const stream = createReadStream()
            const pathName = path.join(__dirname, `/public/images/${filename}`)
            await stream.pipe(fs.createWriteStream(pathName))

            return {
                url: `http://localhost:3000/images/${filename}`,
            }
          },
}