Cesium加载不出来地球：this application is using cesium's default ion access token.

This application is using Cesium's default ion access token. Please assign Cesium.Ion.defaultAccessToken with an access token from your ion account before making any Cesium API calls. You can sign up for a free ion account at https://cesium.com.

http://localhost:8080/s3m-spec-master/S3M_SDK/S3M_Parser_JS/helloworld.html

申请了token怎么使用？

需要多刷新几次地球才能加载出来？？？