Nuget pacakage (Microsoft.EntityFrameworkCore.SqlServer) can not found

I'm trying to add "Microsoft Entity Frame work Core SQL Server" package to my project dependencies(using Visual studio 2019) but its keep telling me package not found every time i search..please is their another way i can get this package install in my project because in can not proceed using database without this package install as i was taught.

This is the image of what I use to get when i search for it