Creating Sentinel-2 cloud free, cloud-shadow free composite or scene on Google Earth Engine (GEE)?

Using this code, I am able to get a cloud-free composite, but it still includes shadows in my image.

var collection = ee.ImageCollection("COPERNICUS/S2")
  .filterBounds(ee.Geometry.Rectangle(-85.14404296875, 46.9502622421856, 
  -71.87255859375, 41.60722821271717));
var S2_cloud = collection.min();

How do I create a Sentinel-2 cloud free, cloud-shadow free composite or scene on Earth Engine (GEE)?