identity server client for auth

src/App/Abstractions/Services/IHttpService.cs

@@ -2,6 +2,7 @@
 {
     public interface IHttpService
     {
-        ApiHttpClient Client { get; }
+        ApiHttpClient ApiClient { get; }
+        IdentityHttpClient IdentityClient { get; }
     }
 }

src/App/Abstractions/Services/ITokenService.cs

@@ -9,6 +9,7 @@ namespace Bit.App.Abstractions
         [Obsolete("Old auth scheme")]
         string AuthBearer { get; set; }
         DateTime TokenExpiration { get; }
+        string TokenIssuer { get; }
         bool TokenExpired { get; }
         TimeSpan TokenTimeRemaining { get; }
         bool TokenNeedsRefresh { get; }