Add the logout for the API.

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

@@ -22,5 +22,12 @@ defmodule LinkShortenerWeb.Api.V1.AccountsController do
       |> put_status(:created)
       |> render(:user, %{user: user, token: token})
     end
+
+  def sign_out(conn, %{}) do
+    token = Guardian.Plug.current_token(conn)
+    Guardian.revoke(token)
+    conn
+    |> put_status(:ok)
+    |> render(:sign_out, %{token: token})
   end
 end

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

@@ -3,9 +3,15 @@ defmodule LinkShortenerWeb.Api.V1.AccountsJSON do
 
   def user(%{user: user, token: token}) do
     %{
-      id: user.id,
       email: user.email,
       token: token
     }
   end
+
+  def sign_out(%{token: token}) do
+    %{
+      message: "Successfully sign out",
+      token: token
+    }
+  end
 end

lib/link_shortener_web/router.ex

@@ -17,6 +17,10 @@ defmodule LinkShortenerWeb.Router do
     plug :accepts, ["json"]
   end
 
+  pipeline :auth do
+    plug LinkShortenerWeb.Auth.Pipeline
+  end
+
   scope "/", LinkShortenerWeb do
     pipe_through :browser
 
@@ -30,6 +34,14 @@ defmodule LinkShortenerWeb.Router do
     scope "/v1", Api.V1, as: :v1 do
       post "/users/sign_up", AccountsController, :sign_up
       post "/users/sign_in", AccountsController, :sign_in
+    end
+  end
+
+  scope "/api", LinkShortenerWeb do
+    pipe_through [:api, :auth]
+
+    scope "/v1", Api.V1, as: :v1 do
+      post "/users/sign_out", AccountsController, :sign_out
 
       resources "/links", LinkController
     end