add google callback method to authencticate

lib/diskuy_web/controllers/user_controller.ex

@@ -4,6 +4,7 @@ defmodule DiskuyWeb.UserController do
   alias Diskuy.Account
   alias Diskuy.Account.User
   alias DiskuyWeb.Auth.Guardian
+  alias DiskuyWeb.Auth.GoogleAuth
 
   action_fallback DiskuyWeb.FallbackController
 
@@ -57,4 +58,13 @@ defmodule DiskuyWeb.UserController do
     end
   end
 
+  def callback(conn, %{"code" => code}) do
+    with {:ok, token} = GoogleAuth.get_access_token(code, conn),
+         {:ok, user, new_token}= GoogleAuth.create_local_token(token) do
+      conn
+      |> put_status(:created)
+      |> render("user_token.json", %{user: user, token: new_token})
+    end
+  end
+
 end

lib/diskuy_web/router.ex

@@ -51,6 +51,11 @@ defmodule DiskuyWeb.Router do
     options   "/users/signin", PostController, :options
   end
 
+  scope "/auth/google", DiskuyWeb do
+    pipe_through :api
+    get "/callback", UserController, :callback
+  end
+
   # Enables LiveDashboard only for development
   #
   # If you want to use the LiveDashboard in production, you should put