I currently try my first steps in Sitefinity development to have a permission set roled out on several Sitefinity instances.
Therefore I wanted to work with the Security library of Sitefinity and follow the Permissions and Roles documentation.
However, I do not have any intellisense to any of the Sitefinity classes. That makes me doubt if the project is working properly with Visual Studio 2019.
I tried to install the Nuget packages as described in several documentations (see below). However packages, such as Telerik.Sitefinity.All or Progress.Sitefinity do not exist in the global Nuget repository.
How do I get these? And why does intellisense not work as intended?
The documentations I used:
The following snippet does not throw any recomendations: