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`Geocoding.MapKey = "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx";
var placemarks = (await Geocoding.GetPlacemarksAsync(location)).ToList();
`
A definition for Geolocation.MapKey or edit the documentation for the new way in 1.0
No definition for Geolocation.MapKey in Xamarin.Essentials 1.0 to use maps UWP.
Xamarin.Forms 3.4 with Visual Studio 2017 and Xamarin.Essentials 1.0

@Agredo look the en-us doc... You need to put this line UWP code project:
Platform.MapServiceToken = "Your-Key";
We have a transition guide here: https://github.com/xamarin/essentials/wiki/Release-Notes
Thank you I searched in the docs. Not release notes. :)
Most helpful comment
@Agredo look the en-us doc... You need to put this line UWP code project:
Platform.MapServiceToken = "Your-Key";