How to prevent your account from being deleted by admins on WordPress.

wprootdev-prevent-user-deletion.php

<?php
function wproot_prevent_user_deletion( $deleting_userid ) {
  
  $protected_userid = 1; //change 1 to the ID of the user you don't want to be deleted.
  
  if ( $deleting_userid == $protected_userid ) {
    
    $user_obj = get_user_by('id', $deleting_userid);
    $name = $user_obj->user_login;
    
    wp_die( sprintf( 'Sorry, you are not allowed to delete user %s.', $name ) );
  }
}
add_action('delete_user', 'wproot_prevent_user_deletion');

/*
Blog post URL: https://wproot.dev/blog/wordpress-how-to-prevent-your-account-from-being-deleted-by-admins/
*/