Additional conditions tags to work

Count the brackets, you’ve got an extra one:

//                                     ↓ here
if ( is_user_logged_in() & !is_admin() ) & !is_page('account') ) {

Also, you should use double ampersands in conditions like this. So:

if ( is_user_logged_in() && !is_admin() && !is_page('account') ) {

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