~abreu-alexandre/unity-webapps-qml/rtm-backport-oa-api-requestaccount

             * - applicationId: the ID of a application (see /usr/share/accounts/applications/ or ~/.local/share/accounts/applications/ for a list of the available applications)

            /**

             * Requests access to an account.

             *

             * Applications must invoke this method in order to obtain access

             * to an account.  The user will be prompted to grant access to

             * either an existing account, to create a new one or to decline

             * the request.

             *

             * @method api.requestAccount

             * @param applicationId {String} The ID of the application

             * requesting the account (see /usr/share/accounts/applications/ or

             * ~/.local/share/accounts/applications/ for a list of the

             * available applications)

             * @param providerId {String} The ID of the provider of the desired

             * account (see /usr/share/accounts/providers/ or

             * ~/.local/share/accounts/providers/ for a list of the available

             * providers)

             * @param callback {Function()} Callback which will be invoked

             * after the access request has been decided (either with the

             * access to an account being granted, or with a refusal).

             *

             * @example

               var api = external.getUnityObject(1.0);

               var oa = api.OnlineAccounts;

 

               var appId = 'com.ubuntu.developer.me.MyPackage_MyApp';

               oa.api.requestAccount(appId,

                                     'facebook',

                                     function() {

                 oa.api.getAccounts({ 'application': appId }, function(result) {

                   for (var i = 0; i < result.length; ++i) {

                     console.log("name: " + result[i].displayName()

                                 + ', id: ' + result[i].accountId()

                                 + ', providerName: ' + result[i].provider().displayName

                                 + ', enabled: ' + (result[i].enabled() ? "true" : "false")

                                 );

                   }

                 });

               });

             */

            requestAccount: function(applicationId, providerId, callback) {

                backendBridge.call('OnlineAccounts.Client.requestAccount',

                                   [ applicationId, providerId],

                                   callback);

            },