diff --git a/lib/ketbin/api/user.ex b/lib/ketbin/api/user.ex
new file mode 100644
index 0000000..8f4f9bc
--- /dev/null
+++ b/lib/ketbin/api/user.ex
@@ -0,0 +1,3 @@
+defmodule Ketbin.Api.User do
+
+end
\ No newline at end of file
diff --git a/lib/ketbin/arch.ex b/lib/ketbin/arch.ex
new file mode 100644
index 0000000..df38547
--- /dev/null
+++ b/lib/ketbin/arch.ex
@@ -0,0 +1,18 @@
+defmodule Ketbin.Schema do
+    @moduledoc """
+    Ketbin keeps the contexts that define your schemas
+    """
+end
+
+
+defmodule Ketbin.Crud do
+    @moduledoc """
+    Ketbin keeps the contexts that define your CRUD functions
+    """
+end
+
+defmodule Ketbin.Api do
+    @moduledoc """
+    Ketbin keeps the contexts that define your business logic.
+    """
+end
\ No newline at end of file
diff --git a/lib/ketbin/crud/user.ex b/lib/ketbin/crud/user.ex
new file mode 100644
index 0000000..fc89cf4
--- /dev/null
+++ b/lib/ketbin/crud/user.ex
@@ -0,0 +1,3 @@
+defmodule Ketbin.Crud.User do
+    
+end
\ No newline at end of file
diff --git a/lib/ketbin/schema/user.ex b/lib/ketbin/schema/user.ex
new file mode 100644
index 0000000..4e0fc8e
--- /dev/null
+++ b/lib/ketbin/schema/user.ex
@@ -0,0 +1,17 @@
+defmodule Ketbin.Schema.User do
+  use Ecto.Schema
+  import Ecto.Changeset
+
+  schema "users" do
+    field :firebase_id, :string
+
+    timestamps()
+  end
+
+  @doc false
+  def changeset(user, attrs) do
+    user
+    |> cast(attrs, [:firebase_id])
+    |> validate_required([:firebase_id])
+  end
+end
diff --git a/priv/repo/migrations/20210809085801_create_users.exs b/priv/repo/migrations/20210809085801_create_users.exs
new file mode 100644
index 0000000..b2162b8
--- /dev/null
+++ b/priv/repo/migrations/20210809085801_create_users.exs
@@ -0,0 +1,12 @@
+defmodule Ketbin.Repo.Migrations.CreateUsers do
+  use Ecto.Migration
+
+  def change do
+    create table(:users) do
+      add :firebase_id, :string
+
+      timestamps()
+    end
+
+  end
+end