Add the API Authentication.

lib/link_shortener_web/controllers/api/v1/user_controller.ex

@@ -3,41 +3,24 @@ defmodule LinkShortenerWeb.Api.V1.UserController do
 
   alias LinkShortener.Accounts
   alias LinkShortener.Accounts.User
+  alias LinkShortenerWeb.Auth.Guardian
 
   action_fallback LinkShortenerWeb.FallbackController
 
-  def index(conn, _params) do
-    users = Accounts.list_users()
-    render(conn, "index.json", users: users)
-  end
-
   def create(conn, %{"user" => user_params}) do
-    with {:ok, %User{} = user} <- Accounts.create_user(user_params) do
+    with {:ok, %User{} = user} <- Accounts.create_user(user_params),
+	 {:ok, token, _claims} <- Guardian.encode_and_sign(user) do
       conn
       |> put_status(:created)
-      |> put_resp_header("location", Routes.v1_user_path(conn, :show, user))
-      |> render("show.json", user: user)
+      |> render("user.json", %{user: user, token: token})
     end
   end
 
-  def show(conn, %{"id" => id}) do
-    user = Accounts.get_user!(id)
-    render(conn, "show.json", user: user)
-  end
-
-  def update(conn, %{"id" => id, "user" => user_params}) do
-    user = Accounts.get_user!(id)
-
-    with {:ok, %User{} = user} <- Accounts.update_user(user, user_params) do
-      render(conn, "show.json", user: user)
-    end
-  end
-
-  def delete(conn, %{"id" => id}) do
-    user = Accounts.get_user!(id)
-
-    with {:ok, %User{}} <- Accounts.delete_user(user) do
-      send_resp(conn, :no_content, "")
+  def signin(conn, %{"email" => email, "password" => password}) do
+    with {:ok, user, token} <- Guardian.authenticate(email, password) do
+      conn
+      |> put_status(:created)
+      |> render("user.json", %{user: user, token: token})
     end
   end
 end