Add support for NuGet Credentials Providers

Author: TrymBeast

src/Cake.NuGet/Cake.NuGet.csproj

@@ -18,7 +18,8 @@
   </ItemGroup>
   <!-- Global packages -->
   <ItemGroup>
-    <PackageReference Include="NuGet.Frameworks"/>
+	<PackageReference Include="NuGet.Credentials"/>
+	<PackageReference Include="NuGet.Frameworks"/>
     <PackageReference Include="NuGet.Versioning" />
     <PackageReference Include="NuGet.Protocol" />
     <PackageReference Include="NuGet.Packaging" />

src/Cake.NuGet/Installers/InProcessInstaller.cs

@@ -12,6 +12,7 @@
 using Cake.Core.IO;
 using NuGet.Common;
 using NuGet.Configuration;
+using NuGet.Credentials;
 using NuGet.Frameworks;
 using NuGet.Packaging;
 using NuGet.Packaging.Core;
@@ -123,6 +124,8 @@ public IReadOnlyCollection<IFile> Install(PackageReference package, PackageType
             allRepositories.AddRange(localAndPrimaryRepositories);
             allRepositories.AddRange(sourceRepositoryProvider.Repositories);
 
+            DefaultCredentialServiceUtility.SetupDefaultCredentialService(_nugetLogger, true);
+
             var packageIdentity = GetPackageId(package, localAndPrimaryRepositories, targetFramework, _sourceCacheContext, _nugetLogger);
             if (packageIdentity == null)
             {

src/Directory.Packages.props

@@ -22,6 +22,7 @@
     <PackageVersion Include="Newtonsoft.Json" Version="13.0.3" />
     <PackageVersion Include="NSubstitute" Version="5.3.0" />
     <PackageVersion Include="NuGet.Common" Version="6.12.1" />
+    <PackageVersion Include="NuGet.Credentials" Version="6.12.1" />
     <PackageVersion Include="NuGet.Frameworks" Version="6.12.1" />
     <PackageVersion Include="NuGet.Packaging" Version="6.12.1" />
     <PackageVersion Include="NuGet.Protocol" Version="6.12.1" />