I have created a web API project in Visual Studio 2019 using DotNet Core 5.0.301 and after I cleaned and built my solution I noticed that there is a yellow exclamation point indicating that there is a dependency missing. Upon inspection I can see that the package Microsoft.AspNetCore.Authentication.AzureAD.UI cannot be found. I went into Nugaet Package Manager and I can see that Microsoft.AspNetCore.Authentication.AzureAD.UI" Version="3.1.15" is installed but it says "Not available in this source". I looked in the Browse option of Nuget but it is not there either. Please help me find a package that will make this work.