Medium, creating a google+ splash page, accessToken helper adjustment

gistfile1.js

var formatAuthResponse = function() {
  if ($scope.authResponse.member_id !== undefined) {
    auth.accessToken = $scope.authResponse.access_token;
    auth.memberId = $scope.memberId;
  } else if ($scope.authResponse.userID !== undefined) {
    auth.accessToken = $scope.authResponse.accessToken;
    auth.userID = $scope.authResponse.userID;
    auth.expires = $scope.authResponse.expires;
  } else if ($scope.authResponse.client_id !== undefined) {
    auth.accessToken = $scope.authResponse.access_token;
    auth.clientID = $scope.authResponse.client_id;
  }
};