@spec from_map!(%{required(String.t()) => any()}) :: %Proxmex.Auth{
  realm: term(),
  secret: term(),
  token_id: term(),
  user: term()
}

@spec header(%Proxmex.Auth{
  realm: term(),
  secret: term(),
  token_id: term(),
  user: term()
}) :: String.t()