public static boolean isSignedIn(){
  String userIdToken=AuthToken.get();
  try {
    verifyAndDeserialize(userIdToken);
  }
 catch (  Exception e) {
    return false;
  }
  return true;
}

public static boolean isSignedIn ( ) { String userIdToken = AuthToken . get ( ) ; try { verifyAndDeserialize ( userIdToken ) ; } catch ( Exception e ) { return false ; } return true ; }
checks if the current user is signed in .
