Behaviour for persisting per-owner MAL tokens.

MyAnimeList ships no schema or database dependency — you supply storage against your own app (Ecto table, ETS, a GenServer, anything). Implement these three callbacks and MyAnimeList stays out of your persistence layer entirely. owner is whatever key identifies a user in your app (a user id, a struct, …).

defmodule MyApp.MALTokens do
  @behaviour MyAnimeList.TokenStore

  @impl true
  def get_token(user_id), do: # → %MyAnimeList.Token{} | nil

  @impl true
  def put_token(user_id, token), do: # persist, → :ok

  @impl true
  def delete_token(user_id), do: # → :ok
end