Ash Authentication password strategy token error when following Getting Started Guide

There have been some changes to this just recently that are likely the cause of the confusion.

authentication do
    tokens do
      token_resource MyApp.Accounts.Token
      signing_secret fn _, _ ->
        Application.fetch_env(:my_app, :token_signing_secret)
      end
    end
end

You need to configure the tokens resource, or set sign_in_tokens_enabled? false.

Make sure to check the very latest version of the docs, and then if you could please open an issue on ash_authentication pointing out the docs that caused confusion and we will address.