I'm refering the link
https://developers.google.com/drive/v3/web/quickstart/ios#step_1_turn_on_the_api_name
To authenticate google drive with my application. I can do signing with google with pod 'Google/SignIn' but not with
pod 'GoogleAPIClientForREST/Drive', '~> 1.1.1'
pod 'GTMOAuth2', '~> 1.1.4'
As link suggest. Also I can see that the above google link says that Last updated March 9, 2017.

It seems like this code is now not is use but google doc is not updated. Please correct me if I'm wrong.