I am trying to set up a google sheet where I can pout in two addresses and get the distance and time travelled from google maps in the excel sheet

I have the script below – but it keeps coming up with an error – error is
Exception: Invalid argument: origin
GOOGLEMAPS @GOOGLEMAPS.gs:4

My script is below
your text

`function GOOGLEMAPS(start_address,end_address,return_type) {

  var mapObj = Maps.newDirectionFinder();
  mapObj.setOrigin(start_address);
  mapObj.setDestination(end_address);
  var directions = mapObj.getDirections();

  var getTheLeg = directions["routes"][0]["legs"][0];

  var meters = getTheLeg["distance"]["value"];

  switch(return_type){
    case "miles":
      return meters * 0.000621371;
      break;
      case "minutes":
      //get duration in seconds
      var duration = getTheLeg["duration"]["value"];
      //convert to minutes and return
      return duration / 60;
      break;
    case "kilometers":
      return meters / 1000;
      break;
    default:
      return "error:wrong unit type";
  }
}`