available features API - has anybody used it?

hi guys,

i'm working through some of the API services, hoping somebody has an example of how to use this in a razor c# page

ms Docs has this reference

https://docs.microsoft.com/en-au/rest/api/power-bi/availablefeatures/getavailablefeaturebyname

and the specific thing i'm looking for is basically this API 

GET https://api.powerbi.com/v1.0/myorg/availableFeatures(featureName='embedTrial')

has anybody used it? i'm a bit in the dark on modern coding these days