text: 
  class Header {
  
    constructor($log, AuthService) {
      this.$log = $log;
      this.authService = AuthService;
    }
  
    logout() {
      this.$log.log('Logging user out');
      this.authService.logout();
    }
  
  }
  
  export const header = {
    template: require('./header.component.html'),
    controller: Header
  };
  