how to plot directions according to destination point?

I am doing an navigation application with Mapbox and Unity. I can get the start and the destination point through

forwardgeocodeuserinput

. This code gives a Geojson file which includes coordinates of points, I don't know how to plot the route.
So, i could not able to draw the route according to start and destination point.

 

You could use a LineRenderer object and set the point coordinates as vertices of the LineRenderer. See https://docs.unity3d.com/Manual/class-LineRenderer.html