`AuthenticationServiceCollectionExtensions` is also a built-in
.NET type under `Microsoft.Extensions.DependencyInjection`. With
both namespaces imported the unqualified references in this test
file failed with CS0104, breaking the entire test project build.
Resolved via a `using` alias so the call sites stay short while
the build stays unambiguous.
Co-authored-by: Cursor <cursoragent@cursor.com>
Oleksandr Bezdieniezhnykh
753be43d11