wp_query: How to retrieve current term slug in custom taxonomy?

I am not sure what your issue is precisely, you are not creating $post, just accessing it. It is a very common sight in WordPress.

However from API point of view, is ID of current post is the only thing you need — use get_the_ID() function to get just that, sans dealing with global yourself.

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