How to add a filter to get_the_author_meta?

If you look in source, you’ll see the filter applied to get_the_author_meta calls:

return apply_filters( 'get_the_author_' . $field, $value, $user_id );

So your filter should hook get_the_author_display_name.

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