How to call a Rails Mountable Engine method from a Rails application?

Muntable Engine Controller Method:

module ServiceApi
 module Api
  module V1
   class RequestorController < ApplicationController
    def get_details(query_parameters)
      #some code here
    end
   end
  end
 end
end

Application Controller Calling the get_details(params) method from the Mountable Engine

ServiceApi::Api::V1::RequestorController.new.get_details(params)