Simple GenServer with incrementing integer

simple_genserver.ex

defmodule IncrementableValue do
  use GenServer

  def start_link() do
    GenServer.start_link(__MODULE__, [])
  end

  def init(_) do
    {:ok, 1}
  end

  def handle_call(:get_data, _, state) do
    {:reply, state, state}
  end

  def handle_cast(:increment, state) do
    {:noreply, state + 1}
  end
end