wp_ajax unauthenticated and authenticated

add_action('wp_ajax_get_post_info', 'get_post_info');
add_action('wp_ajax_nopriv_get_post_info', 'get_post_info');

wp_ajax_nopriv_(action)
only on front-end and only for non logged users. Use wp_ajax_(action) for logged in users.

Hata!: SQLSTATE[HY000] [1045] Access denied for user 'divattrend_liink'@'localhost' (using password: YES)