Random alphanumeric id generator in elixir

generator.ex

defmodule Generator
  def gen_reference() do
    min = String.to_integer("100000", 36)
    max = String.to_integer("ZZZZZZ", 36)

    max
    |> Kernel.-(min)
    |> :rand.uniform()
    |> Kernel.+(min)
    |> Integer.to_string(36)
  end
end

Nice.