diff --git a/src/dotnet/Suspectus.Gandalf.Bridgekeeper.Api/Controllers/AuthController.cs b/src/dotnet/Suspectus.Gandalf.Bridgekeeper.Api/Controllers/AuthController.cs
index eae79d9..c1eb121 100644
--- a/src/dotnet/Suspectus.Gandalf.Bridgekeeper.Api/Controllers/AuthController.cs
+++ b/src/dotnet/Suspectus.Gandalf.Bridgekeeper.Api/Controllers/AuthController.cs
@@ -1,4 +1,5 @@
 using Microsoft.AspNetCore.Mvc;
+using Suspectus.Gandalf.Bridgekeeper.Contracts.Controller.Auth;
 
 namespace Suspectus.Gandalf.Bridgekeeper.Api.Controllers;
 
@@ -12,13 +13,29 @@ public class AuthController : ControllerBase
         return Ok(true);
     }
     
-    [HttpGet("[action]")]
-    public async Task<IActionResult> Login()
+    [HttpPost("[action]")]
+    public async Task<IActionResult> Login([FromBody] LoginCommand loginCommand)
     {
-        return Ok(true);
+        Response.Cookies.Append("MithrandirSession", loginCommand.UsernameOrEmail, new CookieOptions
+        {
+            Secure = true,
+            HttpOnly = true,
+            SameSite = SameSiteMode.Lax,
+            Expires = DateTime.UtcNow.AddMinutes(30)
+        });
+        
+        return Ok();
     }
     
     [HttpGet("[action]")]
+    public async Task<IActionResult> Logout()
+    {
+        Response.Cookies.Delete("MithrandirSession");
+        
+        return Ok();
+    }
+    
+    [HttpPost("[action]")]
     public async Task<IActionResult> Register()
     {
         return Ok(true);
diff --git a/src/dotnet/Suspectus.Gandalf.Bridgekeeper.Api/Program.cs b/src/dotnet/Suspectus.Gandalf.Bridgekeeper.Api/Program.cs
index 7688653..0e90986 100644
--- a/src/dotnet/Suspectus.Gandalf.Bridgekeeper.Api/Program.cs
+++ b/src/dotnet/Suspectus.Gandalf.Bridgekeeper.Api/Program.cs
@@ -1,23 +1,16 @@
 var builder = WebApplication.CreateBuilder(args);
 
-// Add services to the container.
-
 builder.Services.AddControllers();
-// Learn more about configuring OpenAPI at https://aka.ms/aspnet/openapi
 builder.Services.AddOpenApi();
 
 var app = builder.Build();
 
-// Configure the HTTP request pipeline.
 if (app.Environment.IsDevelopment())
 {
     app.MapOpenApi();
 }
 
 app.UseHttpsRedirection();
-
 app.UseAuthorization();
-
 app.MapControllers();
-
 app.Run();
\ No newline at end of file
diff --git a/src/dotnet/Suspectus.Gandalf.Bridgekeeper.Api/Suspectus.Gandalf.Bridgekeeper.Api.csproj b/src/dotnet/Suspectus.Gandalf.Bridgekeeper.Api/Suspectus.Gandalf.Bridgekeeper.Api.csproj
index 34507d4..0be938e 100644
--- a/src/dotnet/Suspectus.Gandalf.Bridgekeeper.Api/Suspectus.Gandalf.Bridgekeeper.Api.csproj
+++ b/src/dotnet/Suspectus.Gandalf.Bridgekeeper.Api/Suspectus.Gandalf.Bridgekeeper.Api.csproj
@@ -11,4 +11,13 @@
         <PackageReference Include="MediatR" Version="12.4.1" />
     </ItemGroup>
 
+    <ItemGroup>
+      <Folder Include="Contracts\Auth\Commands\" />
+      <Folder Include="Contracts\Auth\Queries\" />
+    </ItemGroup>
+
+    <ItemGroup>
+      <ProjectReference Include="..\Suspectus.Gandalf.Bridgekeeper.Contracts\Suspectus.Gandalf.Bridgekeeper.Contracts.csproj" />
+    </ItemGroup>
+
 </Project>
diff --git a/src/dotnet/Suspectus.Gandalf.Bridgekeeper.Contracts/Controller/Auth/LoginCommand.cs b/src/dotnet/Suspectus.Gandalf.Bridgekeeper.Contracts/Controller/Auth/LoginCommand.cs
new file mode 100644
index 0000000..3b08c5f
--- /dev/null
+++ b/src/dotnet/Suspectus.Gandalf.Bridgekeeper.Contracts/Controller/Auth/LoginCommand.cs
@@ -0,0 +1,9 @@
+using Suspectus.Gandalf.Core.Abstractions.CQRS;
+
+namespace Suspectus.Gandalf.Bridgekeeper.Contracts.Controller.Auth;
+
+public class LoginCommand : ICommand<bool>
+{
+    public required string UsernameOrEmail { get; set; }
+    public required string Password { get; set; }
+}
\ No newline at end of file
diff --git a/src/dotnet/Suspectus.Gandalf.Bridgekeeper.Contracts/Suspectus.Gandalf.Bridgekeeper.Contracts.csproj b/src/dotnet/Suspectus.Gandalf.Bridgekeeper.Contracts/Suspectus.Gandalf.Bridgekeeper.Contracts.csproj
new file mode 100644
index 0000000..3553e7f
--- /dev/null
+++ b/src/dotnet/Suspectus.Gandalf.Bridgekeeper.Contracts/Suspectus.Gandalf.Bridgekeeper.Contracts.csproj
@@ -0,0 +1,13 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+    <PropertyGroup>
+        <TargetFramework>net9.0</TargetFramework>
+        <ImplicitUsings>enable</ImplicitUsings>
+        <Nullable>enable</Nullable>
+    </PropertyGroup>
+
+    <ItemGroup>
+      <ProjectReference Include="..\Suspectus.Gandalf.Core.Abstractions\Suspectus.Gandalf.Core.Abstractions.csproj" />
+    </ItemGroup>
+
+</Project>
diff --git a/src/dotnet/Suspectus.Gandalf.Core.Abstractions/CQRS/ICommand.cs b/src/dotnet/Suspectus.Gandalf.Core.Abstractions/CQRS/ICommand.cs
new file mode 100644
index 0000000..be4d069
--- /dev/null
+++ b/src/dotnet/Suspectus.Gandalf.Core.Abstractions/CQRS/ICommand.cs
@@ -0,0 +1,6 @@
+using LanguageExt.Common;
+using MediatR;
+
+namespace Suspectus.Gandalf.Core.Abstractions.CQRS;
+
+public interface ICommand<T> : IRequest<Result<T>>;
\ No newline at end of file
diff --git a/src/dotnet/Suspectus.Gandalf.Core.Abstractions/Suspectus.Gandalf.Core.Abstractions.csproj b/src/dotnet/Suspectus.Gandalf.Core.Abstractions/Suspectus.Gandalf.Core.Abstractions.csproj
new file mode 100644
index 0000000..179a9cd
--- /dev/null
+++ b/src/dotnet/Suspectus.Gandalf.Core.Abstractions/Suspectus.Gandalf.Core.Abstractions.csproj
@@ -0,0 +1,14 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+    <PropertyGroup>
+        <TargetFramework>net9.0</TargetFramework>
+        <ImplicitUsings>enable</ImplicitUsings>
+        <Nullable>enable</Nullable>
+    </PropertyGroup>
+
+    <ItemGroup>
+      <PackageReference Include="LanguageExt.Core" Version="4.4.9" />
+      <PackageReference Include="MediatR" Version="12.4.1" />
+    </ItemGroup>
+
+</Project>
diff --git a/src/dotnet/Suspectus.Gandalf.sln b/src/dotnet/Suspectus.Gandalf.sln
index 0bdda57..6037e87 100644
--- a/src/dotnet/Suspectus.Gandalf.sln
+++ b/src/dotnet/Suspectus.Gandalf.sln
@@ -16,6 +16,10 @@ Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Suspectus.Gandalf.Bridgekee
 EndProject
 Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "Core", "Core", "{3E672AE3-D2E4-49C0-AB18-65E799E5277A}"
 EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Suspectus.Gandalf.Core.Abstractions", "Suspectus.Gandalf.Core.Abstractions\Suspectus.Gandalf.Core.Abstractions.csproj", "{F8333692-CA81-4298-A2F5-CF7D3ACCE230}"
+EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Suspectus.Gandalf.Bridgekeeper.Contracts", "Suspectus.Gandalf.Bridgekeeper.Contracts\Suspectus.Gandalf.Bridgekeeper.Contracts.csproj", "{4ED2E3BC-FE29-4041-8274-987EB60BD5FF}"
+EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
 		Debug|Any CPU = Debug|Any CPU
@@ -42,6 +46,14 @@ Global
 		{264B8A9E-7A70-4DE3-906B-7E0722D09205}.Debug|Any CPU.Build.0 = Debug|Any CPU
 		{264B8A9E-7A70-4DE3-906B-7E0722D09205}.Release|Any CPU.ActiveCfg = Release|Any CPU
 		{264B8A9E-7A70-4DE3-906B-7E0722D09205}.Release|Any CPU.Build.0 = Release|Any CPU
+		{F8333692-CA81-4298-A2F5-CF7D3ACCE230}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{F8333692-CA81-4298-A2F5-CF7D3ACCE230}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{F8333692-CA81-4298-A2F5-CF7D3ACCE230}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{F8333692-CA81-4298-A2F5-CF7D3ACCE230}.Release|Any CPU.Build.0 = Release|Any CPU
+		{4ED2E3BC-FE29-4041-8274-987EB60BD5FF}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{4ED2E3BC-FE29-4041-8274-987EB60BD5FF}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{4ED2E3BC-FE29-4041-8274-987EB60BD5FF}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{4ED2E3BC-FE29-4041-8274-987EB60BD5FF}.Release|Any CPU.Build.0 = Release|Any CPU
 	EndGlobalSection
 	GlobalSection(NestedProjects) = preSolution
 		{44C283FD-2E01-496C-9E8F-4E43C26C9733} = {A82EA24B-1379-41B2-A363-CDCBF9F18833}
@@ -49,5 +61,7 @@ Global
 		{B4AF6985-3268-4C2E-9C50-D92DA7D3711D} = {A82EA24B-1379-41B2-A363-CDCBF9F18833}
 		{C8C3047B-ED0B-4516-A282-8B07E3EEB430} = {A82EA24B-1379-41B2-A363-CDCBF9F18833}
 		{264B8A9E-7A70-4DE3-906B-7E0722D09205} = {D54D8A40-A5C3-4273-B4D7-F2B83056161B}
+		{F8333692-CA81-4298-A2F5-CF7D3ACCE230} = {3E672AE3-D2E4-49C0-AB18-65E799E5277A}
+		{4ED2E3BC-FE29-4041-8274-987EB60BD5FF} = {D54D8A40-A5C3-4273-B4D7-F2B83056161B}
 	EndGlobalSection
 EndGlobal