Abstract: A single application page may include a main view, a login view, and an error view as part of the same page. The login view and the error view may each be associated with a parameter. A client device may request the single application page from a web server. If the client device is not previously authenticated, the single application page switches to the login view. The web server receives login credentials to be authenticated. If the login credentials are valid, the web server may indicate the successful authentication to the client device. The single application page switches to a main view in response to the successful authentication. If the login credentials are invalid, an error parameter may be sent to the client device indicative of the unsuccessful authentication. The single application page may switch to the error view or login view in response to the unsuccessful authentication.