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

 @see #creation_method=