Issue with Adwords Users to Access Ads API and Content API Together

[fita84]

t there is issue coming , i am already using Google Ads APi in the project and whenever i have to call the service i create the object like this .
using (CampaignService objcampaignService = (CampaignService)user.GetService(AdWordsService.v201809.CampaignService))

then i can access all the functions from this object "objcampaignService "

can i use the same "user" object for content service ? as it is already authenticated for scope (google ads and content APi)
and how can i initialize content API service for this user as there is no option for this.?
ShoppingContentService objshoppingContentService = (ShoppingContentService)user.GetService("what to pass here in case of content as there is not content services AdWordsService.v201809.")?
i want to use "objshoppingContentService" but unable to use as it is not linked with content service yet as no option available. Please guide in my context