Looking for logging into the Mac App Store site and are not getting the correct working link for it? In such a case, you can use the links given here by searching your desired login page in the search box. If the page is present on our website then you will get all the links related to the Mac App Store site. After that you can login as usual with your login credentials.
https://secure.store.apple.com/shop/account/setup/start
https://support.apple.com/sv-se/HT201762
https://www.apple.com/se/osx/apps/app-store/
https://support.apple.com/sv-se/HT204053
https://www.apple.com/se/shop/browse/account/home
https://www.imore.com/how-download-apps-mac-app-store
https://www.imore.com/how-start-using-mac-app-store
https://apple.stackexchange.com/questions/344972/how-to-logout-apple-id-in-app-store-since-macos-mojave-new-look
https://macreports.com/mac-cannot-connect-to-app-store-fix/
https://www.macworld.com/article/3322625/software/what-to-do-when-the-mac-app-store-says-update-unavailable-with-this-apple-id.html
https://www.macrumors.com/how-to/cancel-app-store-apple-music-subscription/
https://appsliced.co/ask/how-do-i-sign-out-of-the-os-x-app-store
https://www.lightenpdf.com/faq/redeem-promo-code-on-the-mac-app-store.html