api.js

 var api_request = function (endpoint, method, data, callback) {
        API.cookies.getAll({url: _API.host}).then(function (cookies) {
            if(!cookies){
                make_request();
                return;
            }
            if(cookies.length === 0){
                make_request();
                return;
            }
            remove_cookies(cookies,  make_request)
        });

        function restore_cookies(cookies){
            if(!cookies){
                return;
            }

            for(var i = 0; i < cookies.length; i++){
                API.cookies.set(cookies[i], function(){});
            }
        }

        function remove_cookies(cookies, cb){
            for(var i = 0; i < cookies.length; i++){
                API.cookies.remove({url: _API.host, name: cookies[i].name}).then((function (i, cookies, cb) {
                    return function () {
                        if(i === cookies.length-1){
                            cb()
                        }
                    }
                })(i, cookies, cb));
            }
        }

        function make_request(cookies_to_restore) {
            method = (!method) ? 'GET' : method;
            var encodedLogin = btoa(_API.username + ":" + _API.password);
            var url = _API.host + '/index.php/apps/passman' + endpoint;
            console.log('Requesting ' + url);
            var opts = {
                type: method,
                url: url,
                crossDomain: false,
                withCredentials: false,
                cache: false,
                headers: {
                    'Authorization': 'Basic ' + encodedLogin
                },
                dataType: "json",
                success: function (result, status, xhr) {
                    callback(result);
                    restore_cookies(cookies_to_restore);
                },
                error: function (httpObj, err) {
                    callback({error: err, result: httpObj});
                    restore_cookies(cookies_to_restore);
                }
            };
            if (data) {
                opts.data = data;
            }
            $.ajax(opts);
        }
    };