getting started with kotlin and SpringBootApplication to run some suspend fun

Question

Trying to run this repo with some suspend functions. Can someone please give some hints?

Let say we have one

suspend fun log(){
        mLog.subscribeAlways<GroupMessageEvent> { event ->
        if (event.message.content.contains("Error")) {
            print("****")


        } else if (event.message.content.contains("Warning")) {
            print("Warning")
        }
    }

    mLog.Listen()  
    
  }

How can we trigger this log from main

open class Application {


    companion object {
        @JvmStatic fun main(args: Array<String>) {

            SpringApplication.run(Application::class.java, *args)

        }    
    }
}

What have try, it can run without error, but it didn't work as expected, call the log function from Controller class

class Controller {

    @Value("\${spring.datasource.url}")
    private var dbUrl: String? = null

    @Autowired
    lateinit private var dataSource: DataSource
   
    @RequestMapping("/")
     internal suspend fun index(): String {
         mLog()
        return "index"
    }