Cesium without Ion

CesiumJS
1

Hi, I'd like to use Cesium for commercial use without Ion. As I understand, I can't use some of the payable imagery providers and Ion's terrain provider. Plus, I have to turn off all the Ion assets - regarding this, how can I do it? Is setting Ion's defaultAccessToken to null enough? I did all this, but there is still Ion's logo shown beside the clock. Is there anything else to watch out for? Thank you in advance.

2

js:

viewer._cesiumWidget._creditContainer.parentNode.removeChild(
    viewer._cesiumWidget._creditContainer);

or

viewer._cesiumWidget._creditContainer.style.display = "none";

or css：

.cesium-widget-credits{
    display:none !important;
}