wp_enqueue_scripts is not working in my plugin

plugin_dir_url( __FILE__ ) returns plugin URL with a trailing slash (/). So you have to remove the extra trailing slash.

wp_enqueue_script( 'awesome_form_validation', plugin_dir_url( __FILE__ ). 'js/form_validation.js', array(), '1.0.0', true );

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