Disproportionate scaling

CesiumJS
1

Hi,
Im attempting to scale my .gltf model disproportionately to enhance the scale in Y axis but the compiler doesnt like it. Ive tried the followoing code snippets which fail:

    const entity = viewer.entities.add({
      position: position,
      orientation: orientation,
      model: {
        uri: resource,
        scale: [ 7.0, 10.0, 7.0 ]
      },
    });

    const entity = viewer.entities.add({
      position: position,
      orientation: orientation,
      model: {
        uri: resource,
        scale: new Cesium.Cartesian3(7.0, 10.0, 7.0);
      },
    });

Seems clear its not syntax but more to do with the compiler, any ideas?