lookml_dashboard_id API

[MKLE]

Hi, 

in the API documentation it says that for the import lookl dashboard request (i.e. POST/dashboards/{lookml_dashboard_id}/import/{space_id}) a "lookml_dashboard_id" is required. 

What exactly should this lookml_dashboard_id look like? 

The approach mentioned here does not work: https://www.googlecloudcommunity.com/gc/Technical-Tips-Tricks/How-can-I-find-the-id-of-a-LookML-dash...

An example of a correct post-request would be helpful. 

(Also the option to import lookml-dashboards via the GUI is no longer possible, since the "lookml-dashboard-folder" is no linger visible).