title: where can i find ServiceAccountCredential
body: <p>I am working in google api with asp.net c#, My goal is access google api using service account.</p>
  
  <p>I have imported all needed dlls to create <a href="https://developers.google.com/accounts/docs/OAuth2ServiceAccount" rel="noreferrer">service account</a> to access admin features(admin sdk). </p>
  
  <p>But i couldn't find  ServiceAccountCredential. </p>
  
  <p>How can i implement this in my project?</p>