Future main() async {
  var http2 = new http.Client();
  var clientID = "com.wildfire.mobile";
  var clientSecret = "myspecialsecret ";
  var body = "username=usr&password=pwd&grant_type=password";
  var clientCredentials = new Base64Encoder().convert(
      "$clientID:$clientSecret".codeUnits);
  var response = await
  http.post(
      "http://localhost:8081/auth/token",
      headers: {
        "Content-Type": "application/x-www-form-urlencoded",
        "Authorization": "Basic $clientCredentials"
      },
      body: body);