CustomerCareInitializer.kt

class CustomerCareInitializer @Inject constructor(
    private val session: UserSession,
    private val apiService: ApiService
) : ModuleInitializer {

  override fun initialize(context: Context): Completable {
        return apiService.execute( ... )
            .flatMap { 
                Zendesk.init(...) 
            }
            .ignoreElement()
            .onErrorComplete()
    }
}

SubscriptionInitializer.kt

class SubscriptionInitializer @Inject constructor() : ModuleInitializer {

  override fun initialize(context: Context): Completable {
        // perfom quick initialisation
        
        return Completable.complete()
    }
}