Hello, I’m trying to get the client IP address on login and pass it to provider_option so I can send it in the email as an information to the user, it’s a standard swoosh/postmark email workflow.

Current setup for auth_plug and login method are:

auth_plug.ex

  def call(conn, _opts) do
    uid = get_session(conn, :user_id)

    unless uid do
      conn
      |> Phoenix.Controller.redirect(to: "/login")
      |> halt
    else
      user = Example.Account.User.find!(uid)

      conn
      |> assign(:user, user)
      |> put_ip_address
    end
  end

  def put_ip_address(conn) do
    ip_address =
    List.first(get_req_header(conn, "x-forwared-for")) || "0.0.0.0"

    conn
    |> put_private(:ip_address, ip_address)
  end

user.ex

  def login(email, password) do
    user =
      User
      |> where([t], t.email == ^email and not(is_nil(t.password_hash)))
      |> Repo.one

    has_valid_password = Bcrypt.verify_pass(password, (if user, do: user.password_hash, else: ""))

    if user && has_valid_password do

      new()
      |> Swoosh.Email.from("foo@bar.com")
      |> to(email)
      |> put_provider_option(:template_id, "123124")
      |> put_provider_option(:template_alias, "login-email")
      |> put_provider_option(:template_model, %{user: user.name, ip_address: ip_address})
      |> Example.Mailer.deliver()

      {:ok, user}
    else
      {:error, "Invalid email or password"}
    end
  en

In auth_plug I’ve created a custom function for fetching ip_address and I’m passing it into call function. How can I use put_ip_address in my login method and pass it to put_provider_option?