Aws SNS(Push Notification) Class not found error

Hi, I am trying to get the push notifications to work from amazon AWS simple notifications services and unity using their AmazonAWS SDK. I’ve been following the setup guide linked here.
but when I tried to build the sample scene provided with the sdk I get this error on my phone.

I did put google-play-services.jar and android support.jar inside the Assets\plugins\android folder but for some reason its not able to find the GCM class. Could you please tell me as of what I might be doing wrong? I’ve been trying to figure this out whole day now.


after a bit of digging I found the another jar file of play sevices , turns out the one I was using didnt have the reference to the GCM class