Refresh a Token in JavaScript

Hi, I'm Sarah,

Here, I would like some clarification, On this exemple in the order to refresh the token to embed a rapport, I don't know what correspond to parameters.

You can found on this page: https://github.com/Microsoft/PowerBI-JavaScript/wiki/Refresh-token-using-JavaScript-SDK-example

I have the groupID, reportID, datasetID and embedUrl, but I don't found the accessLevel and the BaseUri.

Whatare these elements and where can I find them?

best regards,

Sarah