How to create a user for only one plugin?

Question

WordPress

I am writing a plugin where a user is created, how can I make this user have access only to this plugin?

Answer 1

You can create an option in the plugin with a nickname or user id and check it for a match.

function plugin_user_option_settings() {
  global $plugin_option_page; // Страница опций
   
  /* Cекция пользователей */
  add_settings_section( 'plugin_user_section', 'Пользователи плагина', '', $plugin_option_page );
 
  $plugin_users_field_params = array(
    'type'      => 'text', //может быть чекбоксы, селекты и т.д., взависимости от ТЗ 
    'id'        => 'plugin_users',
    'desc'      => 'Пользователи с допуском к UI плагина. Укажите ID, или Ник', 
    'label_for' => 'Пользователи с допуском',    
  );
  add_settings_field( 'plugin_user_section_', 'Пользователи системы', 'plugin_user_option_settings',  $plugin_option_page, 'plugin_user_section', $plugin_users_field_params );
    
}
 
add_action( 'admin_init', 'now_open_option_settings' );

// Код написан в качестве примера. Нужны правки и доработки

In fact, it is not entirely clear on the question what exactly is needed. If access to the user is in the backend, then you need to hide everything superfluous. If in the front, then you can write ajax UI (which is a little more complicated, but more correct)