private async loginGoogle() : Promise<void> {
     await this.authService.loginGoogle();
     this.browserService.reload();
 }

 private async loginMicrosoft() : Promise<void> {
     await this.authService.loginMicrosoft();
     this.browserService.reload();
 }

 private async login() : Promise<void> {
     await this.authService.loginLogbook(this.emailAddress, this.password);        
     this.browserService.reload();
 }

 private async register() : Promise<void> {
     await this.authService.register(this.registerEmailAddress, this.registerPassword);
 }

 public activate() : Promise<void> {
     return this.authService
         .logout()
         .then(_ => this.browserService.reload());
 }