Documentation on guest_token API needs more details

[sanjayssk]

There is no issue type on improving the documentation. So adding it under this category.

Screenshot

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Description

Please see the screenshot of input payload. There is no information on what types are available to use in the resources object. If I go by just the single example included in the sources, the only type it uses is "dashboard". What other resource types are available, for example, "chart"?

Further, it is not clear if the id is the id within a dashboard URL or the embedded id obtained from "Embed Dashboard" feature? The example seems to use an id from the URL which is just 1, 2, 3 etc.