add liveview helpers

assets/js/socket.js

@@ -45,7 +45,7 @@ let socket = new Socket("/socket", {params: {token: window.userToken}})
 //       # max_age: 1209600 is equivalent to two weeks in seconds
 //       case Phoenix.Token.verify(socket, "user socket", token, max_age: 1209600) do
 //         {:ok, user_id} ->
-//           {:ok, assign(socket, :user, user_id)}
+//           {:ok, socket |> assign(:user, user_id)}
 //         {:error, reason} ->
 //           :error
 //       end