Implement IKeyManager

Akari.Prototype.Server/Services/IAuthManager.cs

@@ -16,6 +16,7 @@ namespace Akari.Prototype.Server.Services
         void Auth(string name, byte[] token);
 
         bool TryGetKey(string name, out AesGcm key);
+        bool TryGetKey(IEnumerable<string> names, out string name, out AesGcm key);
 
         bool Remove(string name);
     }