title: How to Implement Open Route Service in Leaflet
body: <p>Can I use Open Route Service api in leaflet map? I can't find working example to show how to integrate api key on the map. Now I'm using graphhopper and it's working flawless but now it have restrictions to use up to 5 points.
  When I try to make waypoints via open route service I'm showing this error: <code>Uncaught TypeError: L.Routing.openrouteservice is not a constructor</code>
  My code:</p>
  <pre><code>  var mymap = L.map('mapid').setView([50.27264, 7.26469], 13);
    L.tileLayer('http://{s}.tile.openstreetmap.org/{z}/{x}/{y}.png', {
    attribution: '© OpenStreetMap contributors and ORS'
  }).addTo(this.mymap);
  
  var control = L.Routing.control({
    waypoints: [
      L.latLng(3.102739, 101.598077),
      L.latLng(3.101861, 101.599037)
    ],
    router: new L.Routing.openrouteservice('5b3ce3597851110001cf6248e3cd48b3c44c4e529f8fac67408d4257')
    // routeWhileDragging: true
  }).addTo(this.mymap);
  </code></pre>