Verified users count shortcode in Youzer plugin

yz_verified_users_count_shortcode.php

<?php
function yz_verified_users_count_shortcode( $atts = null ){

		global $wpdb;

		// Get Args.
		$args = shortcode_atts(
			array(
				'verified' => 'on',
			), $atts, 'yz_verified_users_count' );


		$request = "SELECT user_id FROM {$wpdb->usermeta} WHERE meta_key = 'yz_account_verified' AND meta_value = '{$args["verified"]}'";

		$users = $wpdb->get_col( $request );

		return count($users);
	}
	add_shortcode( 'yz_verified_users_count', 'yz_verified_users_count_shortcode' );