Read http only cookie server side

Hello everyone,

I am trying to read a cookie I put on the connection after login. I set it like this…

  defp put_refresh_cookie(conn, token) do
    conn
    |> put_resp_cookie("refresh", token, sign: true, http_only: true, secure: true, max_age: 604800)
    # |> put_resp_cookie("refresh", token, sign: false, http_only: true, secure: true, max_age: 604800)
  end

and I try to read it back in a refresh action of an API controller with…

refresh_cookie = conn.req_cookies["refresh"]

If I use sign: false in put_resp_cookie, I can read it back without problem. With sign: true, the value is not equivalent

How can I read it back when using sign: true?

Thanks in advance