refactor external clients

put model batch size as parameter in config

Azaion.CommonSecurity/Services/AuthProvider.cs

@@ -0,0 +1,26 @@
+using Azaion.CommonSecurity.DTO;
+using Azaion.CommonSecurity.DTO.Commands;
+using Microsoft.Extensions.DependencyInjection;
+
+namespace Azaion.CommonSecurity.Services;
+
+public interface IAuthProvider
+{
+    void Login(ApiCredentials credentials);
+    User CurrentUser { get; }
+}
+
+public class AuthProvider([FromKeyedServices(SecurityConstants.EXTERNAL_INFERENCE_PATH)] IExternalClient externalClient) : IAuthProvider
+{
+    public User CurrentUser { get; private set; } = null!;
+
+    public void Login(ApiCredentials credentials)
+    {
+        externalClient.Send(RemoteCommand.Create(CommandType.Login, credentials));
+        var user = externalClient.Get<User>();
+        if (user == null)
+            throw new Exception("Can't get user from Auth provider");
+
+        CurrentUser = user;
+    }
+}