defmodule TopPosterServer do
  @doc """
  Checks that `discord_id` *could be* a valid discord user id
  """
  @spec is_valid_discord_id(term()) :: boolean()
  def is_valid_discord_id(discord_id) when is_binary(discord_id) do
    String.match?(discord_id, ~r/^\d{17,20}$/)
  end

  def is_valid_discord_id(_), do: false
end