Hololens2 and PUN setup

Hi 

I am creating a PUN2 app for hololens and getting the following errors in the Unity development environment, 

The type or namespace name 'CloudSpatialAnchor' could not be found

The type or namespace name 'Azure' does not exist in the namespace 'Microsoft'

The type or namespace name 'AnchorLocatedEventArgs' could not be found

Any inputs? Thanks