kalau kita baru pertama install wordpress biasanya akan muncul popup FTP Login ketika kita install plugins/theme. nah untuk menghilangkan ini kita bisa menambahkan define('FS_METHOD', 'direct'); pada file wp-config.php

//wp-config.php
<?php
/**
 * The base configuration for WordPress
 *
 * The wp-config.php creation script uses this file during the installation.
 * You don't have to use the web site, you can copy this file to "wp-config.php"
 * and fill in the values.
 *
 * This file contains the following configurations:
 *
 * * Database settings
 * * Secret keys
 * * Database table prefix
 * * ABSPATH
 *
 * @link https://wordpress.org/documentation/article/editing-wp-config-php/
 *
 * @package WordPress
 */

// ** Database settings - You can get this info from your web host ** //
/** The name of the database for WordPress */

define('FS_METHOD', 'direct'); //tambahin disini