Add a WP Admin User when you ONLY have FTP access

Adding WordPress User via FTP

<?php
// 1. GO TO THE THEME’S FOLDER, DOWNLOAD AND OPEN FUNCTIONS.PHP IN YOUR CODE EDITOR.
//path: /wp-content/themes/customtheme/functions.php

//2. ALL THE WAY TO THE BOTTOM OF FUNCTIONS.PHP ADD THIS LINE OF CODE:

wp_insert_user(array('user_pass' => 'password_here', 'user_login' => 'username_here', 'role' => 'administrator'));