var map = L.map('map', {
  'center': [-3.74461, -38.5742],
  'zoom': 15
});

var tileLayer = L.tileLayer('https://{s}.tiles.mapbox.com/v4/{mapId}/{z}/{x}/{y}.png?access_token={token}', {
  attribution: 'Map data &copy; <a href="http://openstreetmap.org">OpenStreetMap</a> contributors, <a href="http://creativecommons.org/licenses/by-sa/2.0/">CC-BY-SA</a>, Imagery © <a href="http://mapbox.com">Mapbox</a>',
  subdomains: ['a','b','c','d'],
  mapId: 'rakshak.l937n12c',
  token: 'pk.eyJ1IjoicmFrc2hhayIsImEiOiJ5cHhqeHlRIn0.Vi87VjI1cKbl1lhOn95Lpw'
});

tileLayer.addTo(map);

var pointA = new L.LatLng(-3.74166, -38.53532);
var pointB = new L.LatLng(-3.74461, -38.5742);

var marker = L.marker(pointA).addTo(map);

var pointList = [pointA, pointB];

// map.center.setTo(pointB);

var firstpolyline = new L.Polyline(pointList, {
    color: 'blue',
    weight: 3,
    opacity: 0.5,
    smoothFactor: 1
});
firstpolyline.addTo(map);