Make “default” wordpress pages & features unaccessible

This sounds like the wrong way around and always having the danger of forgetting or misconfiguring something. If you need content separation, just use a network install. It has a little more overhead of admin but it out of the box ensures the content separation you seek.

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