uNet - need method that is called before OnStartClient()

Hi, I need to call method to generate level before any **OnStartClient()** is called for on players (even Host). But not sure why **OnStartSever()** is not called first, but host`s **OnStartClient()** is. I just need to generate level as soon as game scene is loaded from lobby. Even **OnLobbyServerSceneChanged()** is called only after OnStartClient(). Thanks for any help.