<script>
  function initMap() {
    console.log("hola");
    var uluru = {lat: -25.363, lng: 131.044};
    var map = new google.maps.Map(document.getElementById('map'), {
      zoom: 4,
      center: uluru
    });
    var marker = new google.maps.Marker({
      position: uluru,
      map: map
    });
  }

<div id="map"></div>
  <!-- Replace the value of the key parameter with your own API key. -->[enter image description here][1]

  <script async defer src="https://maps.googleapis.com/maps/api/js?key=--aqui inserte mi key --&callback=initMap"></script>