Personally, I find it eminently credible. And for those idiots like Sarah Sanders who apparently think (or, rather, want others to think) that Cohen would be stupid enough to lie to Congress yet again, when he's already going to jail for lying to that body, I say they're the ones who're dumb as a box of rocks.
https://www.cnn.com/2019/02/27/politics/cohen-testimony-read/index.html
https://www.cnn.com/2019/02/27/politics/cohen-testimony-read/index.html