Definition of "gotta"

“All right, let’s go. They must have sake, eh? Oh, Izuna, will you come along?”“If they have fish or meat, you don’t gotta ask, please.”

2016, Yuu Kamiya, translated by Daniel Komen, No Game No Life, volume 4

I gotta feeling that tonight's gonna be a good night

2009, The Black Eyed Peas, I Gotta Feeling