我使用Scala连接到MongoDB:valdriver=newMongoDrivervalconnection=driver.connection(List("myhost"))valdb=connection.database("mydb")这工作正常，但如何将其与PlayController集成:@SingletonclassReactiveController@Inject()(implicitsystem:ActorSystem,materializer:Materializer,valreactiveMongoApi:ReactiveMongoApi)extendsCont