How can i make Per-vertex lighting in my game

hello everyone. I am making a ps1 inspired game and would very much love to have per-vertex lighting or in other words vertex lighting. how would i go about making my lights affect only vertexes.

here is a link to a vid that shows off the effect im looking for

PS1 Style Vertex Lighting \\ UE4 - YouTube

if you have any possible solutons dont hesitate to answer. thanks in advance, :slight_smile: