lib/ueberauth/strategy/amco/exceptions.ex

defmodule Ueberauth.Strategy.Amco.Exceptions.EmptyErrorHandler do
  defexception message: "error_handler option is required"
end

defmodule Ueberauth.Strategy.Amco.Exceptions.EmptyAccessTokenSource do
  defexception message: "access_token_source option is required"
end