When someone comes back to you after you’ve told them something that decidedly and obviously came through, there’s a perceived desire to say, “I told you so.”
But that’s not really what we want to say.
“I told you so,” says “I was right.”
But aren’t you really trying to establish credibility to be a trusted source, going forward?
When I tell someone something, or give them advice, and it turns out exactly as predicted, I’m not interested in rubbing their nose in it or making sure I get the credit I deserve.
My motivation is to establish the credibility I apparently lacked the first time so the next time they ask for, or receive, advice, they’re more likely to take it.
Perhaps, “I’m available to you whenever you need me.”