Hi skevos2243,
Welcome to the Apple Community, where some of us do our best to help each other.
It does seem strange you haven't been able to connect to the App Store on your MacBook Pro
Your Apple ID is the account that you use to access all Apple services.
Have you checked everything is in order there, and your payment method has a a valid expiry date ?
Apple ID Log-in:
https://appleid.apple.com/
Apple Support have various articles online to help you:
Change, Add or Remove Apple ID Payment methods
https://support.apple.com/en-us/HT201266
ELSE
I wonder if you have updated your Apple ID or password
and the change has not been updated with the App Store ?
If so, Apple Support has an article online to help you.
What to do after you change your Apple ID or password:
https://support.apple.com/en-au/HT204071
OR if that is not helpful:
Have you tried connecting to the App Store in this way ?
Click the small black Apple icon on the left in the top menu bar of your MacBook Pro.
Choose "App Store" from the drop-down menu that opens.
Wondering if you got an error message when you have tried to use the App Store ?
For example:
If your payment method is declined in the App Store or iTunes Store
https://support.apple.com/en-au/HT203005
If nothing so far has helped:
You m might like to check the
Apple ID Support Page:
https://support.apple.com/en-au/apple-id
OR
the questions and answers webpage to see if something has been overlooked ?
Apple ID : FAQ
https://appleid.apple.com/faq
Hope something here will help you troubleshoot :)
