How to use the cloudinary.image function in cloudinary

render: function (res) {
        if (this.value && this.value.url) {
            var thumbnail_url = cloudinary.image(
                this.value.public_id, {
                    format: 'png',
                    width: 150,
                    height: 110,
                    crop: 'fill',
                    alt: this.value.original_name,
                    title: this.value.original_name
                }
            );
            res.write(util.format('<a href="%s">%s</a>\n', this.value.url, thumbnail_url));
            res.write(util.format('<input value="false" name="%s_clear" type="checkbox">\nClear\n', this.name));
        }
        res.write(util.format('<input value="%s" name="%s" type="hidden">\n', this.name, encodeJSONHTML(this.value)));
        this._super(res);
    },
    render_attributes: function (res) {

return new Promise(function(resolve) {
      if (cloudinary.image(filename, { })) {
          resolve(true);
      } else {
          resolve(false);
      }
    });
  }

tag: function (options) {
			return exists(this) ? cloudinary.image(this.get(field.path).public_id, options) : '';
		},
		scale: function (width, height, options) {