/// <summary>
/// Adds the anonymous authentication support to IdentityServer4.
/// </summary>
/// <param name="builder">The builder.</param>
/// <returns></returns>
private static IIdentityServerBuilder AddAnonymousAuthenticationInternal(this IIdentityServerBuilder builder)
{
builder
.AddAnonymousCoreServices()
.AddAnonymousCookieAuthentication()
.AddAnonymousResponseGenerators()
.AddAnonymousValidators()
.AddAnonymousDecoratedEndpoints();
return(builder);
}