wp_nonce_url to users.php for deleting user not working

You’re not using nonces right – you need to match the nonce action & name that WordPress checks in core for deleting a user. Taken from the source of WP_Users_List_Table:

wp_nonce_url( "users.php?action=delete&user={$post->post_author}", 'bulk-users' )

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