Add new wordpress user with functions.php

functions.php

## Add code in functions.php
## Define user, password and email account
function my_admin_account(){
  $user = 'myuser';
  $pass = 'mypass';
  $email = '[email protected]';
  
  if (!username_exists($user) && !email_exists($email)){
    $user_id = wp_create_user($user,$pass,$email);
    $user = new WP_User($user_id);
    $user->set_role('administrator');
  }
}
add_action('init','wpb_admin_account');

## Enter login page mysite.com/wp-admin.
## Enter user and pass.
## Remove function after create user.
## After logged wordpress admin, create new password.

## Reference: https://www.wpbeginner.com/wp-tutorials/how-to-add-an-admin-user-in-wordpress-using-ftp/