
$order = new WC_Order($order_id);
   $order_email = $order->billing_email;
   $email = email_exists( $order_email );  
   $user = username_exists( $order_email );
   		$random_password = wp_generate_password();
	 	$userdata = array(
			'user_pass'          => $random_password,
			'user_login'         => $order_email,
			'first_name'         => $order->billing_first_name,
			'user_email'         => $order_email,
			'role'               => 'customer',
		);
		$userid = wp_insert_user( $userdata );