You can Sign-out of the application and move back to the sign-in screen whenever you need to by clicking the Sign out menu item under the My Profile menu.
Follow the given procedure to Sign-out of the application:
Click on Sign Out menu item on the opened up My Profile menu. The access is shown below,
Once you click the Sign Out menu item you will be logged out of the SKYSITE Archives application and you will be redirected to the sign-in screen from where you can again sign-in to the application if you choose to do so.