diff --git a/src/HelloShop.IdentityService/Constants/DbConstants.cs b/src/HelloShop.IdentityService/Constants/DbConstants.cs
new file mode 100644
index 0000000..a2825ed
--- /dev/null
+++ b/src/HelloShop.IdentityService/Constants/DbConstants.cs
@@ -0,0 +1,7 @@
+namespace HelloShop.IdentityService.Constants
+{
+    public class DbConstants
+    {
+        public const string ConnectionStringName = "IdentityDatabase";
+    }
+}
diff --git a/src/HelloShop.IdentityService/Controllers/UsersController.cs b/src/HelloShop.IdentityService/Controllers/UsersController.cs
new file mode 100644
index 0000000..b3c67c2
--- /dev/null
+++ b/src/HelloShop.IdentityService/Controllers/UsersController.cs
@@ -0,0 +1,36 @@
+using HelloShop.IdentityService.Entities;
+using HelloShop.IdentityService.EntityFrameworks;
+using Microsoft.AspNetCore.Mvc;
+
+// For more information on enabling Web API for empty projects, visit https://go.microsoft.com/fwlink/?LinkID=397860
+
+namespace HelloShop.IdentityService.Controllers
+{
+    [Route("api/[controller]")]
+    [ApiController]
+    public class UsersController(IdentityServiceDbContext dbContext) : ControllerBase
+    {
+        [HttpGet]
+        public IEnumerable<User> Get()
+        {
+            return dbContext.Set<User>();
+        }
+
+        // GET api/<UsersController>/5
+        [HttpGet("{id}")]
+        public User? Get(int id)
+        {
+            return dbContext.Set<User>().Find(id);
+        }
+
+        // POST api/<UsersController>
+        [HttpPost]
+        public void Post([FromBody] User value)
+        {
+            value.CreationTime = DateTimeOffset.Now;
+
+            dbContext.Add(value);
+            dbContext.SaveChanges();
+        }
+    }
+}
diff --git a/src/HelloShop.IdentityService/Entities/User.cs b/src/HelloShop.IdentityService/Entities/User.cs
new file mode 100644
index 0000000..4577e53
--- /dev/null
+++ b/src/HelloShop.IdentityService/Entities/User.cs
@@ -0,0 +1,13 @@
+namespace HelloShop.IdentityService.Entities
+{
+    public class User
+    {
+        public int Id { get; set; }
+
+        public string UserName { get; set; } = default!;
+
+        public string PasswordHash { get; set; } = default!;
+
+        public DateTimeOffset CreationTime { get; set; } = DateTimeOffset.UtcNow;
+    }
+}
diff --git a/src/HelloShop.IdentityService/EntityFrameworks/EntityConfigurations/UserEntityTypeConfiguration.cs b/src/HelloShop.IdentityService/EntityFrameworks/EntityConfigurations/UserEntityTypeConfiguration.cs
new file mode 100644
index 0000000..3798553
--- /dev/null
+++ b/src/HelloShop.IdentityService/EntityFrameworks/EntityConfigurations/UserEntityTypeConfiguration.cs
@@ -0,0 +1,20 @@
+using HelloShop.IdentityService.Entities;
+using Microsoft.EntityFrameworkCore;
+using Microsoft.EntityFrameworkCore.Metadata.Builders;
+
+namespace HelloShop.IdentityService.EntityFrameworks.EntityConfigurations
+{
+    public class UserEntityTypeConfiguration : IEntityTypeConfiguration<User>
+    {
+        public void Configure(EntityTypeBuilder<User> builder)
+        {
+            builder.ToTable("Users");
+
+            builder.HasKey(u => u.Id);
+            builder.Property(u => u.Id).HasColumnOrder(1);
+
+            builder.Property(u => u.UserName).HasMaxLength(50).HasColumnOrder(3);
+            builder.Property(u => u.PasswordHash).HasMaxLength(100).HasColumnOrder(2);
+        }
+    }
+}
diff --git a/src/HelloShop.IdentityService/EntityFrameworks/IdentityServiceDbContext.cs b/src/HelloShop.IdentityService/EntityFrameworks/IdentityServiceDbContext.cs
new file mode 100644
index 0000000..ee5925c
--- /dev/null
+++ b/src/HelloShop.IdentityService/EntityFrameworks/IdentityServiceDbContext.cs
@@ -0,0 +1,18 @@
+using Microsoft.EntityFrameworkCore;
+using System.Reflection;
+
+namespace HelloShop.IdentityService.EntityFrameworks
+{
+    public class IdentityServiceDbContext(DbContextOptions<IdentityServiceDbContext> options) : DbContext(options)
+    {
+        protected override void OnModelCreating(ModelBuilder modelBuilder)
+        {
+            base.OnModelCreating(modelBuilder);
+
+            modelBuilder.ApplyConfigurationsFromAssembly(Assembly.GetExecutingAssembly());
+
+            AppContext.SetSwitch("Npgsql.EnableLegacyTimestampBehavior", true);
+            AppContext.SetSwitch("Npgsql.DisableDateTimeInfinityConversions", true);
+        }
+    }
+}
diff --git a/src/HelloShop.IdentityService/EntityFrameworks/Migrations/20240302004354_InitialCreate.Designer.cs b/src/HelloShop.IdentityService/EntityFrameworks/Migrations/20240302004354_InitialCreate.Designer.cs
new file mode 100644
index 0000000..d62939c
--- /dev/null
+++ b/src/HelloShop.IdentityService/EntityFrameworks/Migrations/20240302004354_InitialCreate.Designer.cs
@@ -0,0 +1,59 @@
+// <auto-generated />
+using System;
+using HelloShop.IdentityService.EntityFrameworks;
+using Microsoft.EntityFrameworkCore;
+using Microsoft.EntityFrameworkCore.Infrastructure;
+using Microsoft.EntityFrameworkCore.Migrations;
+using Microsoft.EntityFrameworkCore.Storage.ValueConversion;
+using Npgsql.EntityFrameworkCore.PostgreSQL.Metadata;
+
+#nullable disable
+
+namespace HelloShop.IdentityService.EntityFrameworks.Migrations
+{
+    [DbContext(typeof(IdentityServiceDbContext))]
+    [Migration("20240302004354_InitialCreate")]
+    partial class InitialCreate
+    {
+        /// <inheritdoc />
+        protected override void BuildTargetModel(ModelBuilder modelBuilder)
+        {
+#pragma warning disable 612, 618
+            modelBuilder
+                .HasAnnotation("ProductVersion", "8.0.2")
+                .HasAnnotation("Relational:MaxIdentifierLength", 63);
+
+            NpgsqlModelBuilderExtensions.UseIdentityByDefaultColumns(modelBuilder);
+
+            modelBuilder.Entity("HelloShop.IdentityService.Entities.User", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("integer")
+                        .HasColumnOrder(1);
+
+                    NpgsqlPropertyBuilderExtensions.UseIdentityByDefaultColumn(b.Property<int>("Id"));
+
+                    b.Property<DateTimeOffset>("CreationTime")
+                        .HasColumnType("timestamp with time zone");
+
+                    b.Property<string>("PasswordHash")
+                        .IsRequired()
+                        .HasMaxLength(100)
+                        .HasColumnType("character varying(100)")
+                        .HasColumnOrder(2);
+
+                    b.Property<string>("UserName")
+                        .IsRequired()
+                        .HasMaxLength(50)
+                        .HasColumnType("character varying(50)")
+                        .HasColumnOrder(3);
+
+                    b.HasKey("Id");
+
+                    b.ToTable("Users", (string)null);
+                });
+#pragma warning restore 612, 618
+        }
+    }
+}
diff --git a/src/HelloShop.IdentityService/EntityFrameworks/Migrations/20240302004354_InitialCreate.cs b/src/HelloShop.IdentityService/EntityFrameworks/Migrations/20240302004354_InitialCreate.cs
new file mode 100644
index 0000000..8186ecb
--- /dev/null
+++ b/src/HelloShop.IdentityService/EntityFrameworks/Migrations/20240302004354_InitialCreate.cs
@@ -0,0 +1,38 @@
+using System;
+using Microsoft.EntityFrameworkCore.Migrations;
+using Npgsql.EntityFrameworkCore.PostgreSQL.Metadata;
+
+#nullable disable
+
+namespace HelloShop.IdentityService.EntityFrameworks.Migrations
+{
+    /// <inheritdoc />
+    public partial class InitialCreate : Migration
+    {
+        /// <inheritdoc />
+        protected override void Up(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.CreateTable(
+                name: "Users",
+                columns: table => new
+                {
+                    Id = table.Column<int>(type: "integer", nullable: false)
+                        .Annotation("Npgsql:ValueGenerationStrategy", NpgsqlValueGenerationStrategy.IdentityByDefaultColumn),
+                    PasswordHash = table.Column<string>(type: "character varying(100)", maxLength: 100, nullable: false),
+                    UserName = table.Column<string>(type: "character varying(50)", maxLength: 50, nullable: false),
+                    CreationTime = table.Column<DateTimeOffset>(type: "timestamp with time zone", nullable: false)
+                },
+                constraints: table =>
+                {
+                    table.PrimaryKey("PK_Users", x => x.Id);
+                });
+        }
+
+        /// <inheritdoc />
+        protected override void Down(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.DropTable(
+                name: "Users");
+        }
+    }
+}
diff --git a/src/HelloShop.IdentityService/EntityFrameworks/Migrations/IdentityServiceDbContextModelSnapshot.cs b/src/HelloShop.IdentityService/EntityFrameworks/Migrations/IdentityServiceDbContextModelSnapshot.cs
new file mode 100644
index 0000000..d28c2ee
--- /dev/null
+++ b/src/HelloShop.IdentityService/EntityFrameworks/Migrations/IdentityServiceDbContextModelSnapshot.cs
@@ -0,0 +1,56 @@
+// <auto-generated />
+using System;
+using HelloShop.IdentityService.EntityFrameworks;
+using Microsoft.EntityFrameworkCore;
+using Microsoft.EntityFrameworkCore.Infrastructure;
+using Microsoft.EntityFrameworkCore.Storage.ValueConversion;
+using Npgsql.EntityFrameworkCore.PostgreSQL.Metadata;
+
+#nullable disable
+
+namespace HelloShop.IdentityService.EntityFrameworks.Migrations
+{
+    [DbContext(typeof(IdentityServiceDbContext))]
+    partial class IdentityServiceDbContextModelSnapshot : ModelSnapshot
+    {
+        protected override void BuildModel(ModelBuilder modelBuilder)
+        {
+#pragma warning disable 612, 618
+            modelBuilder
+                .HasAnnotation("ProductVersion", "8.0.2")
+                .HasAnnotation("Relational:MaxIdentifierLength", 63);
+
+            NpgsqlModelBuilderExtensions.UseIdentityByDefaultColumns(modelBuilder);
+
+            modelBuilder.Entity("HelloShop.IdentityService.Entities.User", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("integer")
+                        .HasColumnOrder(1);
+
+                    NpgsqlPropertyBuilderExtensions.UseIdentityByDefaultColumn(b.Property<int>("Id"));
+
+                    b.Property<DateTimeOffset>("CreationTime")
+                        .HasColumnType("timestamp with time zone");
+
+                    b.Property<string>("PasswordHash")
+                        .IsRequired()
+                        .HasMaxLength(100)
+                        .HasColumnType("character varying(100)")
+                        .HasColumnOrder(2);
+
+                    b.Property<string>("UserName")
+                        .IsRequired()
+                        .HasMaxLength(50)
+                        .HasColumnType("character varying(50)")
+                        .HasColumnOrder(3);
+
+                    b.HasKey("Id");
+
+                    b.ToTable("Users", (string)null);
+                });
+#pragma warning restore 612, 618
+        }
+    }
+}
diff --git a/src/HelloShop.IdentityService/EntityFrameworks/README.md b/src/HelloShop.IdentityService/EntityFrameworks/README.md
new file mode 100644
index 0000000..ca72c96
--- /dev/null
+++ b/src/HelloShop.IdentityService/EntityFrameworks/README.md
@@ -0,0 +1,6 @@
+```shell
+dotnet ef database drop --force
+dotnet ef migrations remove
+dotnet ef migrations add InitialCreate --output-dir EntityFrameworks/Migrations
+dotnet ef database update
+```
\ No newline at end of file
diff --git a/src/HelloShop.IdentityService/HelloShop.IdentityService.csproj b/src/HelloShop.IdentityService/HelloShop.IdentityService.csproj
index a97a79f..9e3561c 100644
--- a/src/HelloShop.IdentityService/HelloShop.IdentityService.csproj
+++ b/src/HelloShop.IdentityService/HelloShop.IdentityService.csproj
@@ -6,6 +6,11 @@
     <InvariantGlobalization>true</InvariantGlobalization>
   </PropertyGroup>
   <ItemGroup>
+    <PackageReference Include="Microsoft.EntityFrameworkCore.Design" Version="8.0.2">
+      <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
+      <PrivateAssets>all</PrivateAssets>
+    </PackageReference>
+    <PackageReference Include="Npgsql.EntityFrameworkCore.PostgreSQL" Version="8.0.2" />
     <PackageReference Include="Swashbuckle.AspNetCore" Version="6.5.0" />
   </ItemGroup>
   <ItemGroup>
diff --git a/src/HelloShop.IdentityService/Program.cs b/src/HelloShop.IdentityService/Program.cs
index edda8a7..8d62b4d 100644
--- a/src/HelloShop.IdentityService/Program.cs
+++ b/src/HelloShop.IdentityService/Program.cs
@@ -1,3 +1,7 @@
+using HelloShop.IdentityService.Constants;
+using HelloShop.IdentityService.EntityFrameworks;
+using Microsoft.EntityFrameworkCore;
+
 var builder = WebApplication.CreateBuilder(args);
 
 builder.AddServiceDefaults();
@@ -9,6 +13,11 @@ builder.Services.AddControllers();
 builder.Services.AddEndpointsApiExplorer();
 builder.Services.AddSwaggerGen();
 
+builder.Services.AddDbContext<IdentityServiceDbContext>(options =>
+{
+    options.UseNpgsql(builder.Configuration.GetConnectionString(DbConstants.ConnectionStringName));
+});
+
 var app = builder.Build();
 
 app.MapDefaultEndpoints();
diff --git a/src/HelloShop.IdentityService/appsettings.json b/src/HelloShop.IdentityService/appsettings.json
index 10f68b8..553fd17 100644
--- a/src/HelloShop.IdentityService/appsettings.json
+++ b/src/HelloShop.IdentityService/appsettings.json
@@ -5,5 +5,8 @@
       "Microsoft.AspNetCore": "Warning"
     }
   },
+  "ConnectionStrings": {
+    "IdentityDatabase": "Host=localhost;Port=5432;Database=IdentityService;Username=postgres;Password=postgres"
+  },
   "AllowedHosts": "*"
 }