Have you ever had to checkmate with 2 bishops or bishop and knight in an actual game?

Yea, the K+B is much trickier. The bishops just synergize so well.

I agree N + B is way tougher, but I mistype "K" a lot more than I should too. Made me think of that Eric Rosen game where he won that drawn position by checkmate with a single Bishop via a King move for discovered checkmate (King in corner trapped behind friendly pawn).

Endgame study is important, but as others have said, these endgames rarely come up, so they're not worth studying. Not until you've run out of more common endgames to study, anyway.

Just get Silman's Complete Endgame Course. The title's inaccurate, since it doesn't cover KNBvK endgames, but you really don't need to learn that until you've mastered everything else in his book.

As for the original question, no, I've never actually had either of these in a game. But I did study them both and could probably do them if they came up, because I learned them from Pandolfini's Endgame Course back before Silman wrote his vastly superior book.

2 knights cant be forced

What about a 2 knight checkmate

I've played dozens of thousands of chess games.

I've only ever been in a bishop and knight and king vs King once, and that was at a highschool chess tournament where i only had a king left and my opponent had the bishop and knight and needed to mate, but ran out of time. 

At average level play I think it's so rare that it really only happens less than a handful of times in your entirety of chess games.