Get directions function [Help]

The ad contains the coordinates of the ad that lead to the map. But the route is not laid automatically, but there is a mark on the center of the selected city.

How to make it so that when you click on the button to lay a route, the current position of the user is determined and the coordinates from the ad are substituted on the map? so that the route is immediately displayed?

Although your location is determined in the mobile version, the coordinates from the ad still do not open on the map. Therefore, the route laid out will not be correct.