Tax query is not working!

You are missing quotes around category as the taxonomy in your query:

'taxonomy' => category,

Needs to be

'taxonomy' => 'category',

So the taxonomy query looks this

'tax_query' => array(
    array(
        'taxonomy' => 'category',
        'terms'    => 14
    )
),

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