medium, creating a login page, meraki logins. logins directive refactored part 2

gistfile1.js

var doLogin = function(resp) {
  createLogin(resp).then(function(clientState) {
    if (clientState !== undefined) {
      merakiLogin(clientState);
    } else {
      login();
    }
  });
};

var createLogin = function(data) {
  var deferred = $q.defer();
  var challenge = data ? data.challenge : '';
  Tony.create({username: scope.username, password: scope.password, challenge: challenge, request_uri: scope.client.requestUri, clientMac: scope.client.clientMac, loginUri: scope.client.loginUri }).$promise.then(function(res) {
    scope.username = res.username;
    scope.response = res.challengeResp;
    deferred.resolve(res.clientState);
  }, function(err) {
    clearScope();
    deferred.reject(err.data.message);
  });
  return deferred.promise;
};