diff --git a/DotBased.AspNet.Authority/Models/Options/Auth/AuthorityAuthenticationOptions.cs b/DotBased.AspNet.Authority/Models/Options/Auth/AuthorityAuthenticationOptions.cs
index 15563a9..9f2a4f4 100644
--- a/DotBased.AspNet.Authority/Models/Options/Auth/AuthorityAuthenticationOptions.cs
+++ b/DotBased.AspNet.Authority/Models/Options/Auth/AuthorityAuthenticationOptions.cs
@@ -5,6 +5,11 @@ public class AuthorityAuthenticationOptions
     public AuthenticationSecurityOptions Security { get; set; } = new AuthenticationSecurityOptions();
     public SessionOptions Session { get; set; } = new SessionOptions();
     public string DefaultScheme { get; set; } = string.Empty;
+    public string DefaultAuthenticateScheme { get; set; } = string.Empty;
+    public string DefaultChallengeScheme { get; set; } = string.Empty;
+    public string DefaultForbidScheme { get; set; } = string.Empty;
+    public string DefaultSignInScheme { get; set; } = string.Empty;
+    public string DefaultSignOutScheme { get; set; } = string.Empty;
     public List<SchemeInfo> SchemeMap { get; set; } = [];
 }
 
diff --git a/DotBased.AspNet.Authority/Services/AuthorityAuthenticationService.cs b/DotBased.AspNet.Authority/Services/AuthorityAuthenticationService.cs
index ab31b60..b9556b1 100644
--- a/DotBased.AspNet.Authority/Services/AuthorityAuthenticationService.cs
+++ b/DotBased.AspNet.Authority/Services/AuthorityAuthenticationService.cs
@@ -1,47 +1,101 @@
 using System.Security.Claims;
-using DotBased.AspNet.Authority.Managers;
 using DotBased.AspNet.Authority.Models.Options.Auth;
+using DotBased.Logging;
 using Microsoft.AspNetCore.Authentication;
 using Microsoft.AspNetCore.Http;
 using Microsoft.Extensions.Options;
 
 namespace DotBased.AspNet.Authority.Services;
 
-public class AuthorityAuthenticationService(IAuthenticationSchemeProvider schemes,
+public class AuthorityAuthenticationService(
     IAuthenticationHandlerProvider handlers,
     IClaimsTransformation transform,
-    IOptions<AuthorityAuthenticationOptions> options,
-    AuthorityManager manager) : IAuthenticationService
+    IOptions<AuthorityAuthenticationOptions> options) : IAuthenticationService
 {
+    private readonly ILogger _logger = LogService.RegisterLogger(typeof(AuthorityAuthenticationService));
+    private readonly AuthorityAuthenticationOptions _options = options.Value;
+    
     public async Task<AuthenticateResult> AuthenticateAsync(HttpContext context, string scheme)
     {
-        throw new NotImplementedException();
+        _logger.Debug("Authenticate with scheme: {Scheme}", scheme);
+        
+        var authenticationHandler = await GetAuthenticationHandler(context, scheme, _options.DefaultAuthenticateScheme);
+        var authResult = await authenticationHandler.AuthenticateAsync();
+
+        return authResult is { Succeeded: true }
+            ? AuthenticateResult.Success(
+                new AuthenticationTicket(await transform.TransformAsync(authResult.Principal), authResult.Properties, authResult.Ticket.AuthenticationScheme)) :
+            AuthenticateResult.Fail("Failed to authenticate");
     }
 
     public async Task ChallengeAsync(HttpContext context, string scheme, AuthenticationProperties properties)
     {
-        throw new NotImplementedException();
+        _logger.Debug("Challenging with scheme: {Scheme}", scheme);
+        
+        var authenticationHandler = await GetAuthenticationHandler(context, scheme, _options.DefaultChallengeScheme);
+        await authenticationHandler.ChallengeAsync(properties);
     }
 
     public async Task ForbidAsync(HttpContext context, string scheme, AuthenticationProperties properties)
     {
-        throw new NotImplementedException();
+        _logger.Debug("Forbid with scheme: {Scheme}", scheme);
+        
+        var authenticationHandler = await GetAuthenticationHandler(context, scheme, _options.DefaultForbidScheme);
+        await authenticationHandler.ForbidAsync(properties);
     }
 
     public async Task SignInAsync(HttpContext context, string scheme, ClaimsPrincipal principal, AuthenticationProperties properties)
     {
-        throw new NotImplementedException();
+        _logger.Debug("SignIn with scheme: {Scheme}", scheme);
+        
+        var authenticationHandler = await GetAuthenticationHandler(context, scheme, _options.DefaultSignInScheme);
+        if (authenticationHandler is not IAuthenticationSignInHandler signInHandler)
+        {
+            throw new InvalidOperationException("Authentication handler is not a IAuthenticationSignInHandler.");
+        }
+        await signInHandler.SignInAsync(principal, properties);
     }
 
     public async Task SignOutAsync(HttpContext context, string scheme, AuthenticationProperties properties)
     {
-        throw new NotImplementedException();
+        _logger.Debug("SignOut with scheme: {Scheme}", scheme);
+        
+        var authenticationHandler = await GetAuthenticationHandler(context, scheme, _options.DefaultSignOutScheme);
+        if (authenticationHandler is not IAuthenticationSignOutHandler signOutHandler)
+        {
+            throw new InvalidOperationException("Authentication handler is not a IAuthenticationSignOutHandler.");
+        }
+        await signOutHandler.SignOutAsync(properties);
     }
 
-    public async Task ValidateLoginAsync()
+    /*public async Task ValidateLoginAsync()
     {
-        
         //TODO: Check if user is logged in from external identity provider, if user not exists in authority db create user.
         throw new NotImplementedException();
+    }*/
+
+    private async Task<IAuthenticationHandler> GetAuthenticationHandler(HttpContext context, string scheme, string defaultScheme)
+    {
+        if (string.IsNullOrWhiteSpace(scheme))
+        {
+            scheme = defaultScheme;
+            if (string.IsNullOrWhiteSpace(scheme))
+            {
+                scheme = _options.DefaultScheme;
+                if (string.IsNullOrWhiteSpace(scheme))
+                {
+                    throw new InvalidOperationException("Failed to get default scheme. No scheme specified.");
+                }
+            }
+        }
+        
+        var authenticationHandler = await handlers.GetHandlerAsync(context, scheme);
+        if (authenticationHandler == null)
+        {
+            _logger.Warning("Failed to load handler for scheme: {Scheme}", scheme);
+            throw new InvalidOperationException($"No authentication handlers registered to the scheme '{scheme}'");
+        }
+        
+        return authenticationHandler;
     }
 }
\ No newline at end of file