def index(conn, _params) do
    conn
    |> put_flash(:info, "Welcome : info")
    |> put_flash(:error, "Welcome : error")
    render conn, "index.html"
  end

private: %{EverlearnWeb.Router => {[], %{}},
:phoenix_action => :index,
:phoenix_controller => EverlearnWeb.PageController,
:phoenix_endpoint => EverlearnWeb.Endpoint,
:phoenix_flash => %{"error" => "Welcome : error", "info" => "Welcome : info"},
:phoenix_layout => {EverlearnWeb.LayoutView, :app},
:phoenix_pipelines => [:browser], :phoenix_router => EverlearnWeb.Router,
:phoenix_view => EverlearnWeb.PageView,
:plug_session => %{"_csrf_token" => "xxx",
 "phoenix_flash" => %{"info" => "Welcome back Thibaut, your are signed in !"},
 "user_id" => 1}, :plug_session_fetch => :done}

conn
|> put_flash(:info, "Welcome : info")
|> put_flash(:error, "Welcome : error")
|> render("index.html")