"com.google.android.gms.auth.GoogleAuthException: Unknown" in GoogleAuthUtils.getToken() call

I was recently developing a simple Android application that would access Google Spreadsheets. To access the spreadsheet, the users would have to authorize the app to access their data. To get that authorization, I will have to use this command:

mToken = GoogleAuthUtil.geToken(MyActivity.this, accountName, "oauth2:https://spreadsheets.google.com/feeds https://docs.google.com/feeds");

The problem was that, I was getting this error when getToken() executed:

Exception in getToken() - GoogleAuthException
com.google.android.gms.auth.GoogleAuthException: Unknown
at com.google.android.gms.auth.GoogleAuthUtil.getToken(Unknown Source)
  at com.google.android.gms.auth.GoogleAuthUtil.getToken(Unknown Source)
  at somepackage.LoginHomeActivity$2.doInBackground(LoginHomeActivity.java:80)
  at somepackage.LoginHomeActivity$2.doInBackground(LoginHomeActivity.java:1)
  at android.os.AsyncTask$2.call(AsyncTask.java:264)
  at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:305)
  at java.util.concurrent.FutureTask.run(FutureTask.java:137)
  at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:208)
  at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1076)
  at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:569)
  at java.lang.Thread.run(Thread.java:856)

After a bit of digging around, I realize that the reason for the error is the scope string. Here, I am using this:

oath2:https://spreadsheets.google.com/feeds https://docs.google.com/feeds

It should be this: https://docs.google.com/feeds/ https://docs.googleusercontent.com/ https://spreadsheets.google.com/feeds/

That is, I don't have an option of choosing just a bunch of scopes. I will have to use all of the urls as scope.

Just FYI, I got the scope value for Google Spreadsheet from here