How do I sign in via Apple Login? Instructions for logging in via Apple Login Login in the app: If you have already registered with us via Apple ID, click on "Login" and then on "Continue with Apple". Your account is linked to your Apple ID, allowing you to sign in even faster. Login to the website: Visit the following website to log in to our website with your Apple ID: https://www.maedchenflohmarkt.de/connect/apple.