Implement login endpoint

lib/matrix_server_web/api/login.ex

@@ -0,0 +1,42 @@
+# https://gist.github.com/char0n/6fca76e886a2cfbd3aaa05526f287728
+defmodule MatrixServerWeb.API.Login do
+  use Ecto.Schema
+
+  import Ecto.Changeset
+
+  defmodule MatrixServerWeb.API.Login.Identifier do
+    use Ecto.Schema
+
+    import Ecto.Changeset
+
+    @primary_key false
+    embedded_schema do
+      field :type, :string
+      field :user, :string
+    end
+
+    def changeset(identifier, attrs) do
+      identifier
+      |> cast(attrs, [:type, :user])
+      |> validate_required([:type, :user])
+    end
+  end
+
+  alias MatrixServerWeb.API.Login.Identifier
+
+  @primary_key false
+  embedded_schema do
+    field :type, :string
+    field :password, :string
+    field :device_id, :string
+    field :initial_device_display_name, :string
+    embeds_one :identifier, Identifier
+  end
+
+  def changeset(attrs) do
+    %__MODULE__{}
+    |> cast(attrs, [:type, :password, :device_id, :initial_device_display_name])
+    |> cast_embed(:identifier, with: &Identifier.changeset/2, required: true)
+    |> validate_required([:type, :password])
+  end
+end

lib/matrix_server_web/api/register.ex

@@ -4,9 +4,9 @@ defmodule MatrixServerWeb.API.Register do
   import Ecto.Changeset
   import MatrixServerWeb.Plug.Error
 
-  alias __MODULE__
   alias Ecto.Changeset
 
+  @primary_key false
   embedded_schema do
     field :device_id, :string
     field :initial_device_display_name, :string
@@ -16,7 +16,7 @@ defmodule MatrixServerWeb.API.Register do
   end
 
   def changeset(params) do
-    %Register{}
+    %__MODULE__{}
     |> cast(params, [
       :device_id,
       :initial_device_display_name,