Display based on specific user

Have you considered using the get_the_author_meta() function? It would look something like this:

if (get_the_author_meta('ID') == ID_YOU_ARE_TESTING_FOR) {
     // display text
}

This would need to be used within the Loop.

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