def default_find_method
      ->(params) do
        updated_params = Oath.transform_params(params)
        Oath.config.user_class.find_by(updated_params)
      end
    end
def default_find_method
      ->(params) do
        updated_params = Oath.transform_params(params)
        Oath.config.user_class.find_by(updated_params)
      end
    end
Default find method. Can be overriden via {Oath.configure}

 @see #find_method=
 @see Oath.config.user_class