user_socket.ex

 def connect(%{"token" => token}, socket) do
    with {:ok, user_id} <-
           Phoenix.Token.verify(PhoenixAbsintheAuthenticatedSubscriptionsWeb.Endpoint, "user sesion", token,
             max_age: 86_400
           ),
         %Accounts.User{} = current_user <- Accounts.lookup_user(user_id) do
      socket =
        Absinthe.Phoenix.Socket.put_options(socket,
          context: %{
            current_user: current_user
          }
        )

      {:ok, socket}
    else
      _ ->
        :error
    end
  end

  def connect(_, _), do: :error