refactor(ISenderHandler): Umbenennung in IAuthSenderHandler.

- umbenannt in SendMessageAsync als SendKeyAsync

DigitalData.Auth.Abstractions/IAuthClient.cs

@@ -1,6 +1,6 @@
 namespace DigitalData.Auth.Abstractions;
 
-public interface IAuthClient : IListenHandler, ISenderHandler
+public interface IAuthClient : IListenHandler, IAuthSenderHandler
 {
     bool IsConnected { get; }
 

DigitalData.Auth.Abstractions/IAuthSenderHandler.cs

@@ -0,0 +1,6 @@
+namespace DigitalData.Auth.Abstractions;
+
+public interface IAuthSenderHandler
+{
+    Task SendKeyAsync(string topic, string key);
+}

DigitalData.Auth.Abstractions/ISenderHandler.cs

@@ -1,6 +0,0 @@
-namespace DigitalData.Auth.Abstractions;
-
-public interface ISenderHandler
-{
-    Task SendMessageAsync(string user, string message);
-}