diff --git a/DTO/UserDTO.cs b/DTO/UserDTO.cs
new file mode 100644
index 0000000..f78d9a6
--- /dev/null
+++ b/DTO/UserDTO.cs
@@ -0,0 +1,8 @@
+namespace backend.DTO;
+
+public class UserDTO
+{
+    public string UserName { get; set; }
+    public string? Email { get; set; }
+    public string Password { get; set; }
+}
diff --git a/Models/UserIdentity.cs b/Models/UserIdentity.cs
new file mode 100644
index 0000000..a9501eb
--- /dev/null
+++ b/Models/UserIdentity.cs
@@ -0,0 +1,14 @@
+using MongoDB.Bson.Serialization.Attributes;
+
+namespace backend.Models;
+
+public class UserIdentity
+{
+    [BsonId]
+    [BsonRepresentation(MongoDB.Bson.BsonType.ObjectId)]
+    public string Id { get; set; }
+    public string UserName { get; set; }
+    public string Password { get; set; }
+    public string Email { get; set; }
+    public string Role { get; set; }
+}
\ No newline at end of file
diff --git a/Program.cs b/Program.cs
index db12bd5..8eea6e6 100644
--- a/Program.cs
+++ b/Program.cs
@@ -1,5 +1,8 @@
+using System.Text;
 using backend.Models;
 using backend.Services;
+using Microsoft.AspNetCore.Authentication.JwtBearer;
+using Microsoft.IdentityModel.Tokens;
 
 var builder = WebApplication.CreateBuilder(args);
 
@@ -7,7 +10,10 @@ var builder = WebApplication.CreateBuilder(args);
 
 builder.Services.Configure<BlogDatabaseSettings>(builder.Configuration.GetSection("BlogDatabase"));
 
+//Authentication
+builder.Services.AddAuthentication(JwtBearerDefaults.AuthenticationScheme).AddJwtBearer();
 builder.Services.AddSingleton<UserService>();
+
 builder.Services.AddControllers();
 
 
@@ -22,13 +28,14 @@ if (app.Environment.IsDevelopment())
 {
     app.UseStaticFiles();
     app.UseSwagger();
-    app.UseSwaggerUI(c=> c.InjectStylesheet("/swagger-ui/darkMode.css"));
+    app.UseSwaggerUI(c => c.InjectStylesheet("/swagger-ui/darkMode.css"));
 }
 
 app.UseHttpsRedirection();
 
+app.UseAuthentication();
 app.UseAuthorization();
 
 app.MapControllers();
 
-app.Run();
+app.Run();
\ No newline at end of file
diff --git a/backend.csproj b/backend.csproj
index 11f9191..dd964a1 100644
--- a/backend.csproj
+++ b/backend.csproj
@@ -7,8 +7,10 @@
   </PropertyGroup>
 
   <ItemGroup>
+    <PackageReference Include="Microsoft.AspNetCore.Authentication.JwtBearer" Version="6.0.5" />
     <PackageReference Include="MongoDB.Driver" Version="2.15.1" />
     <PackageReference Include="Swashbuckle.AspNetCore" Version="6.2.3" />
+    <PackageReference Include="System.IdentityModel.Tokens.Jwt" Version="6.18.0" />
   </ItemGroup>
 
 </Project>