I use google analytics api .net . I use exactly these sample codes here.
When i use Oauth 2.0 , i have no problem and every thing works good . But when i want to use Service account Authentication , i get null here ( x is null)
var x = DaimtoAnaltyicsReportingHelper.Get(service, "78110423", "10daysAgo", "today", "ga:sessions", options);
What is missed ?
(I already created p12 file and have service account email )