Sends API calls non-blocking during login.

wpf-non-blocking-during-login.php

<?php

/**
 * Sends API calls non-blocking during login.
 *
 * This is useful if your CRM has a slow API, it will allow the user to log in
 * without any noticable delay. However, if the API is offline or fails to process
 * the request, no error will be logged and there will be no indication it failed.
 *
 * @param array $parsed_args The HTTP API request args.
 */
function set_login_to_async( $parsed_args ) {

	if ( did_action( 'wp_login' ) ) {
		$parsed_args['blocking'] = false;
	}

	return $parsed_args;

}

add_filter( 'http_request_args', 'set_login_to_async', 100 );