How to get public transit instructions

Hello guys,
I want to use Graphhopper to get public transit instructions, but when I use this tutorial (https://github.com/graphhopper/graphhopper/issues/1739) to run it, it gives me the walk instruction in the response even when I set the vehicle to pt.
I want to get instructions like this image (https://www.graphhopper.com/wp-content/uploads/2018/05/Screen-Shot-2018-05-16-at-21.23.25-600x538.png) that is described in this blog post (https://www.graphhopper.com/blog/2018/05/16/real-time-public-transit-routing/)

Can you please help me?

Thanks

It was my mistake in reading instructions but I have another problem that graphhopper seems to not use shape.txt data and just draw a straight line between the stations. How can I fix it to draw the real geometry?