internal…

login.service.js
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			(function () {
			'use strict';

			angular
			.module('shrine.steward.login')
			.factory('LoginService', LoginService);

			LoginService.$inject = ['$http','StewardService'];
			function LoginService($http, StewardService) {

			var svc = StewardService;

			return {
			setAuthHeader: setAuthHeader,
			setCredentials: setCredentials,
			clearCredentials: clearCredentials
			};

			function setAuthHeader(username, password) {
			var authdata = svc.commonService.toBase64(username + ':' + password);
			$http.defaults.headers.common['Authorization'] = 'Basic ' + authdata;
			}

			function setCredentials(username, password, roles) {
			var authdata = svc.commonService.toBase64(username + ':' + password);
			svc.setAppUser(username, authdata, roles);
			}

			function clearCredentials() {
			var user = svc.getAppUser();
			svc.deleteAppUser();
			$http.defaults.headers.common.Authorization = ' Basic ';
			}
			}
			})();