Using VScode with proxy that you might have some problems like this.
Trying to remove http_proxy windows environment variable and restart VS code.
Problem:
Using following command
dotnet new --install aspnetcore-vuejs::1.0.9
and then terminal shows some errors
authentication failed because the connection could not be reused nuget
Nuget Unable to connect to remote server
Solution:
Trying to remove http_proxy windows environment variable and restart VS code.